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2018

Upadhyay, Abhishek and Lengden, Michael and Wilson, David and Humphries, Gordon Samuel and Crayford, Andrew P. and Pugh, Daniel G. and Johnson, Mark P. and Stewart, George and Johnstone, Walter (2018) A new RAM normalized 1f-WMS technique for the measurement of gas parameters in harsh environments and a comparison with 2f/1f. IEEE Photonics Journal, 10 (6). 6804611. ISSN 1943-0655

2017

Benoy, Thomas and Wilson, David and Lengden, Michael and Armstrong, Ian and Stewart, George and Johnstone, Walter (2017) Measurement of CO2 concentration and temperature in an aero engine exhaust plume using wavelength modulation spectroscopy. IEEE Sensors Journal, 17 (19). pp. 6409-6417. ISSN 1530-437X

Upadhyay, Abhishek and Wilson, David and Lengden, Michael and Chakraborty, Arup L. and Stewart, George and Johnstone, Walter (2017) Calibration-free WMS using a cw-DFB-QCL, a VCSEL, and an edge-emitting DFB laser with in-situ real-time laser parameter characterization. IEEE Photonics Journal, 9 (2). 6801217. ISSN 1943-0655

2016

Benoy, Thomas and Lengden, Michael and Stewart, George and Johnstone, Walter (2016) Recovery of absorption line shapes with correction for the wavelength modulation characteristics of DFB lasers. IEEE Photonics Journal, 8 (3). 1501717. ISSN 1943-0655

Valiunas, Jonas K. and Stewart, George and Das, Gautam (2016) Detection of nitrous oxide (N2O) at sub-ppmv using intracavity absorption spectroscopy. IEEE Photonics Technology Letters, 28 (3). pp. 359-362. ISSN 1041-1135

Bain, James and Lengden, Michael and Stewart, George and Johnstone, Walter (2016) Recovery of absolute absorption line shapes in tunable diode laser spectroscopy using external amplitude modulation with balanced detection. IEEE Sensors Journal, 16 (3). pp. 675-680. ISSN 1530-437X

2015

Bauer, Ralf and Legg, Thomas and Mitchell, David and Flockhart, Gordon M. H. and Stewart, George and Johnstone, Walter and Lengden, Michael (2015) Miniaturized photoacoustic trace gas sensing using a raman fiber amplifier. Journal of Lightwave Technology, 33 (18). pp. 3773-3780. ISSN 0733-8724

Dudus, A. and Blue, R. and Zagnoni, M. and Stewart, G. and Uttamchandani, D. (2015) Modeling and characterization of an electrowetting based single mode fiber variable optical attenuator. IEEE Journal of Selected Topics in Quantum Electronics, 21 (4). 4500209. ISSN 1077-260X

2014

Bauer, Ralf and Stewart, George and Johnstone, Walter and Lengden, Michael (2014) Photoacoustic trace gas sensing using a miniature 3D printed gas cell. In: Photon14, 2014-09-01 - 2014-09-04, Imperial College London.

Dudus̈, Anna and Blue, Robert and Zagnoni, Michele and Stewart, George and Uttamchandani, Deepak; (2014) Theoretical and experimental analysis of side-polished fiber optofluidic variable attenuator. In: International Conference on Optical MEMS and Nanophotonics. IEEE, GBR, pp. 67-68. ISBN 9780992841423

Bauer, Ralf and Stewart, George and Johnstone, Walter and Boyd, Euan and Lengden, Michael (2014) A 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases. Optics Letters, 39 (16). pp. 4796-4799. ISSN 0146-9592

Duduś, A. and Blue, R. and Zagnoni, M. and Stewart, G. and Uttamchandani, D. (2014) In-line single-mode fiber variable optical attenuator based on electrically addressable microdroplets. Applied Physics Letters, 105 (2). 021105. ISSN 0003-6951

Benoy, Thomas and Lengden, Michael and Armstrong, Ian and Wilson, David and Stewart, George and Johnstone, Walter (2014) Near IR tunable diode laser spectroscopy for aero engine research. In: FLAIR 2014 - Field Laser Applications in Industry and Research, 2014-05-05 - 2014-05-09.

Bauer, Ralf and Stewart, George and Johnstone, Walter and Lengden, Michael (2014) A miniaturised 3D printed resonant photoacoustic cell for trace gas sensing. In: FLAIR 2014 - Field Laser Applications in Industry and Research, 2014-05-05 - 2014-05-09.

Duduś, Anna Maria and Blue, Robert and Zagnoni, Michele and Stewart, George and Uttamchandani, Deepak; (2014) Theoretical and experimental analysis of side-polished fiber optofluidic variable attenuator. In: 2014 International Conference on Optical MEMS and Nanophotonics (OMN). IEEE, GBR, pp. 67-68. ISBN 9780992841409

2013

Bain, James and Lengden, Michael and Armstrong, Ian and Stewart, George and Johnstone, Walter (2013) Development of tunable diode laser spectroscopy instrumentation for gas species measurements in harsh environments. In: Applied Industrial Optics: Spectroscopy, Imaging, and Metrology, 2013-06-23 - 2013-06-27, Virginia.

2011

Pierce, Stephen and Flockhart, Gordon and Mcguire, Michelle and Bennecer, Abdeldjalil and Hayward, Gordon and Thursby, Graham and Stewart, George and Culshaw, Brian (2011) Towards smart sonar transducers - polarimetric sensing for sonar array compensation. In: 8th International Workshop on Structural Health Monitoring, 2011-09-13 - 2011-09-15.

Li, Li and Arshad, Norhana and Stewart, George and Thursby, Graham and Uttamchandani, Deepak and Culshaw, Brian and Yang, YD (2011) Absorption line profile recovery based on TDLS and MEMS micro-mirror for photoacoustic gas sensing. Spectroscopy and Spectral Analysis, 31 (7). pp. 1814-1818.

Bain, James Roderic Peter and Lengden, Michael and Stewart, George and Black, John and Johnstone, Walter (2011) Development of a TDLS-based ambient water vapour sensor for aeroengine intake temperature determination. In: 8th International Conference on Tunable Diode Laser Spectroscopy, 2011-07-11 - 2011-07-15. (Unpublished)

Stewart, George and Arsad, Norhana (2011) Fibre lasers for photo-acoustic gas spectroscopy. In: 21st International Conference on Optical Fibre Sensors, 2011-05-15 - 2011-05-19.

Bain, James Roderic Peter and Johnstone, Walter and Ruxton, Keith Crawford and Stewart, George and Lengden, Michael and Duffin, Kevin (2011) Recovery of absolute gas absorption line shapes using tunable diode laser spectroscopy with wavelength modulation - Part 2 : experimental investigation. Journal of Lightwave Technology, 29 (7). pp. 987-996. ISSN 0733-8724

Bain, James and Lengden, Michael and Stewart, George and Johnstone, Walter (2011) Tunable diode laser spectroscopy for process control and diagnostics in industrial systems. In: 2nd Annual SU2P symposium, 2011, 2011-03-28.

Stewart, George and Johnstone, Walter and Bain, James Roderic Peter and Ruxton, Keith Crawford and Duffin, Kevin (2011) Recovery of absolute gas absorption line shapes using tuneable diode laser spectroscopy with wavelength modulation- part 1 : theoretical analysis. Journal of Lightwave Technology, 29 (6). pp. 811-821. ISSN 0733-8724

Arsad, Norhana and Min, Li and Stewart, George and Johnstone, Walter (2011) Intra-cavity spectroscopy using amplified spontaneous emission in fiber lasers. Journal of Lightwave Technology, 29 (5). pp. 782-788. ISSN 0733-8724

Li, Li and Arsad, Norhana and Stewart, G. and Thursby, G.J. and Culshaw, B. and Wang, Yiding (2011) Absorption line profile recovery based on residual amplitude modulation and first harmonic integration methods in photoacoustic gas sensing. Optics Communications, 284 (1). pp. 312-316. ISSN 0030-4018

2010

Ruxton, Keith C. and Chakraborty, Arup Lal and Johnstone, W. and Lengden, Michael and Stewart, G. and Duffin, K. (2010) Tunable diode laser spectroscopy with wavelength modulation : elimination of residual amplitude modulation in a phasor decomposition approach. Sensors and Actuators B: Chemical, 150 (1). pp. 367-375. ISSN 0925-4005

Stewart, George and Ruxton, Keith Crawford and Chakraborty, Arup and Johnstone, Walter (2010) Tunable diode laser spectroscopy with wavelength modulation : an overview of current techniques and motivations. In: IoP Photonics 10 Conference, 2010-08-23 - 2010-08-26.

Stewart, G. and Johnstone, W. and Thursby, G.J. and Culshaw, B. (2010) Near infrared spectroscopy for fibre based gas detection. Proceedings of SPIE: The International Society for Optical Engineering, 7675. 767507.

Li, Li and Thursby, G.J. and Stewart, G. and Arsad, Norhana and Uttamchandani, D.G. and Culshaw, B. and Wang, Yiding (2010) Recovery of acetylene absorption line profile basing on tunable diode laser spectroscopy with intensity modulation and photoacoustic spectroscopy. Proceedings of SPIE: The International Society for Optical Engineering, 7726 (77261O).

Li, Li and Stewart, George and Thursby, Graham and Arsad, Norhana and Uttamchandani, Deepak and Culshaw, Brian and Wang, Yiding; Ye, T and Han, S and Kameyama, M and Hu, S, eds. (2010) External laser intensity modulation basing on MEMS micro-mirror applied to gas sensing. In: Proceedings of SPIE. Proceedings of SPIE-The International Society for Optical Engineering, 7657 . SPIE, CHN, 76570M. ISBN 9780819480873

2009

Sheridan, A.K. and Stewart, G. and Ur-Reyman, H. and Suyal, N. and Uttamchandani, D.G. (2009) In-plane integration of polymer microfluidic channels with optical waveguides - a preliminary investigation. IEEE Sensors Journal, 9 (12). pp. 1627-1632. ISSN 1530-437X

Culshaw, Brian and Johnstone, W. and Stewart, G. and Duffin, K. and Mauchline, Iain S. and Walsh, Douglas (2009) Gas sensing based on optical fibre coupled diode laser spectroscopy : a new approach to sensor systems for safety monitoring. In: 9th IMVC Mine Ventilation Conference, 2009-11-10.

Ruxton, K.C. and Chakraborty, A. and McGettrick, A.J. and Duffin, K. and Stewart, G. (2009) Recent advance in tunable diode laser spectroscopy with background RAM nulling for industrial applications. In: 20th International Conference on Optical Fibre Sensors, 2009-10-05.

Ruxton, Keith C. and Chakraborty, Arup Lal and McGettrick, A.J. and Duffin, K. and Johnstone, W. and Stewart, G. (2009) Recent advance in tunable diode-laser spectroscopy with background RAM nulling for industrial applications. Proceedings of SPIE: The International Society for Optical Engineering, 7503 (750313).

Bain, J.R.P. and Stewart, G. and Duffin, K. and Lengden, M. and Ruxton, K.C. and Johnstone, W. (2009) Recovery of absolute gas absorption lineshapes using TDLS at arbitrary modulation indices. In: UNSPECIFIED.

Bain, J.R.P. and Stewart, G. and Duffin, K. and Lengden, M. and Ruxton, K.C. and Johnstone, W. (2009) Recovery of gas absorption lineshapes using TDLS at arbitrary modulation indices. In: International Conference on Field Laser Applications in Industry and Research, 2009-09-06 - 2009-09-11, Hotel am Badersee.

Ruxton, K.C. and Chakraborty, A. and McGettrick, A.J. and Duffin, K. and Johnstone, W. and Stewart, G. (2009) Diode laser spectroscopy using a calibration free phasor decomposition approach with RAM nulling. In: 7th International Conference on Tunable Diode Laser Spectroscopy, 2009-07-13 - 2009-07-17.

Lengden, M. and Johnstone, W. and Bain, J.R.P. and Stewart, G. and Armstrong, I. (2009) Preliminary gas composition investigations at elevated temperatures and pressures using calibration-free tDLS with the residual amplitude modulation technique. In: 7th International Conference on Tunable Diode Laser Spectroscopy, 2009-07-13 - 2009-07-17.

Mirza, M.A. and Stewart, G. (2009) Multiwavelength operation of erbium-doped fiber lasers by periodic filtering and phase modulation. Journal of Lightwave Technology, 27 (8). pp. 1034-1044. ISSN 0733-8724

Arsad, N. and Stewart, G. (2009) Stable, tunable and single-mode operation of an erbium-doped fibre laser system using a saturable absorber for gas spectroscopy applications. Proceedings of SPIE: The International Society for Optical Engineering, 7195. p. 719525.

Ruxton, Keith C. and Chakraborty, Arup Lal and McGettrick, A.J. and Duffin, K. and Johnstone, W. and Stewart, G. (2009) Diode laser spectroscopy using a calibration free phasor decomposition approach to RAM nulling. In: 7th International Conference on Tunable Diode Laser Spectroscopy, 2009-07-13 - 2009-07-17.

Flockhart, G. M.H. and Mcguire, M. and Pierce, S.G. and Thursby, G. and Stewart, G. and Hayward, G. and Culshaw, B. (2009) Direct monitoring of underwater ultrasonic transducers in the near field using fibre bragg grating sensors. Proceedings of SPIE: The International Society for Optical Engineering, 7503. p. 750331.

Stewart, George and Arsad, Norhana (2009) Intra-cavity spectroscopy using amplified spontaneous emission in erbium fibre lasers. Proceedings of SPIE: The International Society for Optical Engineering, 7503. 750312-1 - 750312-4.

2008

Duffin, K. and Johnstone, W. and McGettrick, A.J. and Moodie, D. and Stewart, G. and Thursby, G.J. and Culshaw, B. (2008) Chemical sensor networks for gas detection and environmental monitoring. Current Analytical Chemistry, 4 (4). pp. 391-402. ISSN 1573-4110

Mirza, M.A. and Stewart, G. (2008) Theory and design of a simple tunable sagnac loop filter for multi-wavelength fibre lasers. Applied Optics, 47 (29). pp. 5242-5252. ISSN 1559-128X

McGettrick, A.J. and Johnstone, W. and Duffin, K. and Stewart, G. (2008) Calibration free gas composition measurements for industrial process control using a phasor decomposition approach to tunable diode laser spectroscopy. In: Photon 08, 2008-08-25 - 2008-08-28. (Unpublished)

Johnstone, W. and McGettrick, A.J. and Duffin, K. and Cheung, A. and Stewart, G. (2008) Tunable diode laser spectroscopy for industrial process applications : system characterization in conventional and new approaches. IEEE Sensors Journal, 8 (7). pp. 1079-1088. ISSN 1530-437X

McGettrick, A.J. and Duffin, K. and Johnstone, W. and Stewart, G. and Moodie, D.G. (2008) Tunable diode laser spectroscopy with wavelength modulation : a phasor decomposition method for calibration-free measurements of gas concentration and pressure. Journal of Lightwave Technology, 26 (4). pp. 432-440. ISSN 0733-8724

Johnstone, W. and McGettrick, A.J. and Duffin, K. and Stewart, G. (2008) Calibration free, optical measurements of gas composition for industrial process control in harsh environments. In: Fifth International Conference on Condition Monitoring and Machine Failure Prevention Technologies, 2008-07-15 - 2008-07-18. (Unpublished)

Stewart, G. and Johnstone, W. and Arsad, N. and Duffin, K. (2008) Tunable diode and fibre laser spectroscopy in the near-IR for measurement of gas parameters. Proceedings of SPIE: The International Society for Optical Engineering, 7003. p. 700319.

2007

Duffin, K. and McGettrick, A.J. and Johnstone, W. and Stewart, G. and Moodie, D. (2007) Tunable diode laser spectroscopy with wavelength modulation : a calibration-free approach to the recovery of absolute gas absorption line-shapes. Journal of Lightwave Technology, 25 (10). pp. 3114-3125. ISSN 0733-8724

Mirza, M.A. and Stewart, G. (2007) Design of a multi-wavelength fibre laser using an intra-cavity phase modulator and sagnac loop filter for sensor applications. In: Third European Workshop on Optical Fibre Sensors, 2007-07-04 - 2007-07-06.

Stewart, G. and Whitenett, G. and Vijayraghavan, K. and Sridaran, S. (2007) Investigation of the dynamic response of erbium fibre lasers with potential application for sensors. Journal of Lightwave Technology, 25 (7). pp. 1786-1796. ISSN 0733-8724

Duffin, K. and McGettrick, A.D. and Johnstone, W. and Stewart, G. (2007) An alternative approach to wavelength modulation spectroscopy for absolute measurements of gas parameters in industrial processes. In: Chemical and Biological Sensors for Industrial and Environmental Monitoring III, 2006-07-12.

2006

Marshall, Joanna and Stewart, George and Whitenett, Gillian (2006) Design of a tuneable L-Band multi-wavelength laser system for application to gas spectroscopy. Measurement Science and Technology, 17 (4). pp. 1023-1031. ISSN 0957-0233

Massie, Crawford and Stewart, George and McGregor, George and Gilchrist, John R. (2006) Design of a portable optical sensor for methane gas detection. Sensors and Actuators B: Chemical, 113 (2). pp. 830-836. ISSN 0925-4005

Stewart, G. and Whitenett, G.L. and Culshaw, B. and Sridaran, S. and Karthik, V. (2006) Analysis of the transient response of erbium fibre lasers and application for sensors. In: SPIE Optics East, 2006-10-01 - 2006-10-04.

Meng, Z. and Stewart, G. and Whitenett, G.L. (2006) Stable single-mode operation of a narrow-linewidth, linear polarization erbium fibre ring laser using a saturable absorber. Journal of Lightwave Technology, 24 (5). pp. 2179-2183. ISSN 0733-8724

2005

Stewart, G. and Karthik, V. and Whitenett, G.L. (2005) Optical fibre sensors based on the dynamic response of fibre lasers. In: 17th International Conference on Optical Fibre Sensors, 2005-05-23 - 2005-05-27.

Stewart, G.; Webb, Colin E. and Jones, Julian D C, eds. (2005) Optical waveguide theory. In: Handbook of laser technology and applications. IOP. ISBN 0750309601

Meng, Z. and Hu, Y. and Xiong, S. and Stewart, G. and Whitenett, G.L. and Culshaw, B. (2005) Phase noise characteristics of a diode-pumped Nd:YAG laser in an unbalanced fiber-optic interferometer. Applied Optics, 44 (17). pp. 3425-3428. ISSN 1559-128X

Marshall, J. and Stewart, G. and Whitenett, G.L. and Culshaw, B. (2005) Tuneable L band multi-wavelength fibre laser using silicon wafers. In: 17th International Conference on Optical Fibre Sensors, 2005-05-23 - 2005-05-27.

Johnstone, Walter and Duffin, Kevin and Mcgettrick, Andrew James and Stewart, George and CHEUNG, Amy and Moodie, D. (2005) Tuneable diode laser spectroscopy over optical fibres for gas measurements in harsh industrial environments. Proceedings of SPIE: The International Society for Optical Engineering, 5952. p. 595206.

2004

MENG, ZHAOJUN and Hu, Y. and Ni, M. and Xiong, S. and Zhang, R. and Li, X. and Stewart, G. and Dong, F. and Culshaw, B.; Marcus, M.A. and Culshaw, B. and Dakin, J.P., eds. (2004) Development of a 32-element fibre optic hydrophone system. In: Fiber optic sensor technology and applications III. Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE) . SPIE, USA, pp. 114-119. ISBN 0819455423

Stewart, George and Whitenett, Gillian and Marshall, Joanna P. and Johnstone, Walter and Culshaw, Brian and MacLean, Alistair and Mauchline, Iain S. and Moodie, David G. (2004) Remote gas analysis using fibre optic links and near infrared adsorption. Proceedings of SPIE: The International Society for Optical Engineering, 5459 (285). pp. 285-294.

Stewart, G. and Whitenett, G.L. and Marshall, J. and Culshaw, B. (2004) Fibre lasers for near-IR gas spectroscopy. In: 2nd European Workshop on Optical Fibre Sensors, 2004-06-09 - 2004-06-11.

Whitenett, G.L. and Stewart, G. and Yu, Hongbo and Culshaw, B. (2004) Investigation of a tuneable mode-locked fibre laser for application to multi-point gas spectroscopy. Journal of Lightwave Technology, 22 (3). pp. 813-819. ISSN 0733-8724

Hitz, B. and Stewart, G. (2004) Amplifier enhances ring-down spectroscopy. Photonics Spectra, 38 (5). pp. 124-125. ISSN 0731-1230

Stewart, G. and Atherton, K. and Culshaw, B. (2004) Cavity enhanced spectroscopy in fibre cavities. Optics Letters, 29 (5). pp. 442-444.

Stewart, G. and Shields, P. and Culshaw, B. (2004) Development of fibre laser systems for ring-down and intracavity gas spectroscopy in the near-IR. Measurement Science and Technology, 15 (8). pp. 1621-1628. ISSN 0957-0233

Vijayraghavan, K. and Stewart, G. (2004) Experimental and theoretical investigation of fiber ring laser dynamics and transient analysis. In: 7th International Conference on Optoelectronics, Fiber Optics and Photonics, 2004-12-08 - 2004-12-11.

Zhang, Y. and Zhang, M. and Jin, W. and Ho, H.L. and Demokan, M.S. and Culshaw, B. and Stewart, G. (2004) Investigation of erbium-doped fiber laser intra-cavity absorption sensor for gas detection. Optics Communications, 232 (1-6). pp. 295-301. ISSN 0030-4018

2003

Stewart, G. and Whitenett, G.L. and Shields, P. and Marshall, J. and Culshaw, B. (2003) Design of fibre laser and sensor systems for gas spectroscopy in the near-IR. In: Conference on Industrial and Highway Sensors Technology, 2003-10-28 - 2003-10-30.

Walsh, D.J. and Moodie, D. and Mauchline, I.S. and Johnstone, Walter and Stewart, George (2003) OptoSci educator kits - an immediate solution to photonics teaching laboratories. In: Education and Training in Optics and Photonics (ETOP) 2003, 2003-10-06.

Stewart, G. and Culshaw, B. and Johnstone, W. and Whitenett, G.L. and Atherton, K. and McLean, A. (2003) Optical fibre sensors and networks for environmental monitoring. Management of Environmental Quality, 14 (2). pp. 181-190. ISSN 1477-7835

2002

Jin, W. and Ho, H. and Stewart, G. and Culshaw, B. (2002) Fibre optic gas sensing using absorption spectroscopy. Trends in Applied Spectroscopy, 4. pp. 155-163. ISSN 0972-4516

Zhang, Yan and Jin, W. and Yu, H.B. and Zhang, M. and Liao, Y.B. and Ho, H.L. and Demokan, M.S. and Stewart, G. and Culshaw, B. and Li, Y.H. (2002) Novel intra-cavity sensing network based on mode-locked fibre laser. IEEE Photonics Technology Letters, 14 (9). pp. 1336-1338. ISSN 1041-1135

Stewart, G. and Whitenett, G.L. and Atherton, K. and Culshaw, B. and Johnstone, W. (2002) Optical fibre sensors for environmental monitoring of trace gases. In: 19th Congress of the International-Commission-for-Optics, 2002-08-25 - 2002-08-30.

Atherton, K. and Stewart, G. and Culshaw, B. (2002) Cavity ring-down in a fibre amplifier loop and combination with wavelength modulation spectroscopy. In: 15th Optical Fiber Sensors Conference, 2002-05-06 - 2002-05-10.

Culshaw, B. and Johnstone, W. and McLean, A. and Mauchline, I.S. and Moodie, D. and Stewart, G. (2002) Large scale multiplexing a point sensor for methane gas detection. In: 15th Optical Fiber Sensors Conference, 2002-05-06 - 2002-05-10.

Stewart, G. and Yu, H.D. and Whitenett, G.L. and Culshaw, B. (2002) A mode-locked fibre laser system for multi-point intra-cavity gas spectroscopy. In: 15th Optical Fiber Sensors Conference, 2002-05-06 - 2002-05-10.

Yu, H.D. and Jin, W. and Liao, Y. and Stewart, G. and Culshaw, B. and Ho, H. and Li, Y. (2002) A novel fiber-optic intra-cavity sensing network using a mode-locked fiber ring laser. In: 15th Optical Fiber Sensors Conference, 2002-05-06 - 2002-05-10.

Atherton, K. and Stewart, G. and Culshaw, B.; Christesen, S.D and Sedlacek, A.J, eds. (2002) Gas detection by cavity ring-down absorption with a fibre optic amplifier loop. In: Vibrational spectrocopy-based sensor systems. Proceedings of the society of photo-optical instrumentation engineers (SPIE) . SPIE, USA, pp. 25-31. ISBN 0819443050

2001

Yu, H.B. and Jin, W. and Ho, H.L. and Chan, K.C. and Chan, C.C. and Demokan, M.S. and Stewart, G. and Culshaw, B. and Liao, Y.B. (2001) Multiplexing of optical fibre gas sensors with an FMCW technique. Applied Optics, 40 (7). pp. 1011-1020. ISSN 1559-128X

Stewart, G. and Atherton, K. and Yu, Hongbo and Culshaw, B. (2001) Investigation of optical fibre amplifier loop for intracavity and ring down cavity loss measurements. Measurement Science and Technology, 12 (7). pp. 843-849. ISSN 0957-0233