22 February 2006 Hybrid ECL/DBR wavelength and spectrum stabilized lasers demonstrate high power and narrow spectral linewidth
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The use of LiNbO3 based Volume Holographic Gratings (VHGs) to provide spectrally filtered feedback to a semiconductor laser diode was documented in the mid 1980s1, however issues with long term stability had left this technology on the sidelines. Photo-sensitive glass based VHGs do not exhibit long term aging or thermal/photo bleaching effects, and therefore have enabled a new type of External Cavity Laser (ECL). This highly manufacturable "hybrid ECL/DBR" (HECL) laser utilizes precision VHGs and has been used to create high performance lasers with spectrally tailored output. Lasers with fiber coupled output powers in excess of 4.2 W and spectral line widths of less than 0.15 nm have been demonstrated. Additionally, multi-mode lasers have been developed for High Resolution Raman Spectroscopy that exhibit spectral line widths below 0.06 nm (i.e. < 1 wavenumber) with fiber coupled output power in excess of 350 mW. The use of glass based VHGs provides HECL laser wavelength stabilization of better than 0.01 nm/oC, and allows the production of lasers at virtually any wavelength between 650 nm - 2400 nm.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Scott L. Rudder, Scott L. Rudder, John C. Connolly, John C. Connolly, Gregory J. Steckman, Gregory J. Steckman, } "Hybrid ECL/DBR wavelength and spectrum stabilized lasers demonstrate high power and narrow spectral linewidth", Proc. SPIE 6101, Laser Beam Control and Applications, 61010I (22 February 2006); doi: 10.1117/12.646791; https://doi.org/10.1117/12.646791


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