Picture of virus under microscope

Research under the microscope...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

Explore SIPBS research

Passive mode-locking of a Ti:sapphire laser by InGaP quantum-dot saturable absorber

Savitski, V.G. and Schlosser, P.J. and Hastie, J.E. and Krysa, A.B. and Roberts, J.S. and Dawson, M.D. and Burns, D. and Calvez, S. (2010) Passive mode-locking of a Ti:sapphire laser by InGaP quantum-dot saturable absorber. IEEE Photonics Technology Letters, 22 (4). pp. 209-211. ISSN 1041-1135

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

We demonstrate the use of a novel InGaP quantum-dot (QD) saturable absorber (SA) to induce passively mode-locked (ML) operation of a Ti : sapphire laser. Pulses as short as 518 fs are obtained at 752 nm with an average output power of up to 190 mW for 2.3 W of absorbed pump power at 532 nm. The absorption recovery of the SA is characterized by two decay coefficients: a fast and a slow component having time constants of 0.4 and 300 ps, respectively. The saturation fluence of the InGaP QDs was measured to be 28 J/cm2, the initial low-signal absorption was 1.5%, where 1.15% was nonsaturable loss.