Versatile 1 W narrow band 976 nm and 1064 nm light sources

S. Mohrdiek; H.-U. Pfeiffer; E. A. Zibik; B. Sverdlov; T. Pliska; N. Lichtenstein

doi:10.1117/12.874608

16 February 2011 Versatile 1 W narrow band 976 nm and 1064 nm light sources

S. Mohrdiek, H.-U. Pfeiffer, E. A. Zibik, B. Sverdlov, T. Pliska, N. Lichtenstein

Proceedings Volume 7953, Novel In-Plane Semiconductor Lasers X; 795310 (2011) https://doi.org/10.1117/12.874608
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

We report on development of novel curved waveguide (CWG) laser devices, where the emission wavelength centered at ~976 nm is stabilized to a 20 dB bandwidth of less than 100 picometer by using fiber Bragg gratings (FBG). Radiation from the curved waveguide laser is coupled using an anamorphic fiber lens into a single mode polarization maintaining fiber containing the FBG, the latter acting as a front reflector. The high power gain chip is based on Oclaro's InGaAs/AlGaAs quantum well laser. Use of the curved waveguide geometry allows to eliminate residual reflections in the optical path of the cavity, which is formed by the rear chip facet and the FBG. It is well known that additional reflections lead to significant deterioration of the spectral and power stability. The devices, assembled in telecom type housings, provide up to 1 W of low-noise and kink-free CW power. In addition pulse operation in nanosecond range is also investigated. The spectral stabilization time to the wavelength of the FBG is limited by the external cavity roundtrip of ~2 ns. A side mode suppression ratio of about 40 dB and higher is achieved for pulsed and CW operation. Results are also presented for a device at 1064 nm. Numerous applications can be envisioned for these devices. For instance devices with high power and ultranarrow spectral bandwidth allow greater flexibility in the choice of parameters for frequency conversion applications. In pulsed mode the device can be used in the special sensing applications where spectral stability is crucial.

Citation Download Citation

S. Mohrdiek, H.-U. Pfeiffer, E. A. Zibik, B. Sverdlov, T. Pliska, and N. Lichtenstein "Versatile 1 W narrow band 976 nm and 1064 nm light sources", Proc. SPIE 7953, Novel In-Plane Semiconductor Lasers X, 795310 (16 February 2011); https://doi.org/10.1117/12.874608

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KEYWORDS

Fiber Bragg gratings

Waveguides

Diodes

Semiconductors

Fiber lasers

Semiconductor lasers

Pulsed laser operation

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