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A simple extended-cavity diode laser

Arnold, A S and Wilson, J S and Boshier, M G (1998) A simple extended-cavity diode laser. Review of Scientific Instruments, 69 (3). pp. 1236-1239. ISSN 0034-6748

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Operating a laser diode in an extended cavity which provides frequency-selective feedback is a very effective method of reducing the laser's linewidth and improving its tunability. We have developed an extremely simple laser of this type, built from inexpensive commercial components with only a few minor modifications, A 780 nm laser built to this design has an output power of 80 mW, a Linewidth of 350 kHz, and it has been continuously locked to a Doppler-free rubidium transition for several days.