Abstract
Single spatial mode laser diodes are commercially available with output powers as high as 200 mW cw, however, these index- guided lasers employ facets to form the optical cavity.1,2 These laser diodes are susceptible to external feedback which can dramatically alter the temporal spectral characteristics. However, applications exist such as frequency-doubling and the pumping of the atomic transitions in cesium vapor, at 852 nm, or helium, at 1083 µm, where well defined and stable single frequency operation is required. DBR and DFB laser diodes provide such stable spectral behavior but have previously been limited in power.
© 1994 Optical Society of America
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