Translator Disclaimer
4 March 2016 Wavelength locking of single emitters and multi-emitter modules: simulation and experiments
Author Affiliations +
Abstract
Wavelength-stabilized high-brightness single emitters are commonly used in fiber-coupled laser diode modules for pumping Yb-doped lasers at 976 nm, and Nd-doped ones at 808 nm. We investigate the spectral behavior of single emitters under wavelength-selective feedback from a volume Bragg (or hologram) grating (VBG) in a multi-emitter module.

By integrating a full VBG model as a multi-layer thin film structure with commercial raytracing software, we simulated wavelength locking conditions as a function of beam divergence and angular alignment tolerances. Good correlation between the simulated VBG feedback strength and experimentally measured locking ranges, in both VBG misalignment angle and laser temperature, is demonstrated.

The challenges of assembling multi-emitter modules based on beam-stacked optical architectures are specifically addressed, where the wavelength locking conditions must be achieved simultaneously with high fiber coupling efficiency for each emitter in the module. It is shown that angular misorientation between fast and slow-axis collimating optics can have a dramatic effect on the spectral and power performance of the module.

We report the development of our NEON-S wavelength-stabilized fiber laser pump module, which uses a VBG to provide wavelength-selective optical feedback in the collimated portion of the beam. Powered by our purpose-developed high-brightness single emitters, the module delivers 47 W output at 11 A from an 0.15 NA fiber and a 0.3 nm linewidth at 976 nm. Preliminary wavelength-locking results at 808 nm are also presented.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dan Yanson, Noam Rappaport, Ophir Peleg, Yuri Berk, Nir Dahan, Genady Klumel, Ilya Baskin, and Moshe Levy "Wavelength locking of single emitters and multi-emitter modules: simulation and experiments", Proc. SPIE 9733, High-Power Diode Laser Technology and Applications XIV, 97330J (4 March 2016); https://doi.org/10.1117/12.2212373
PROCEEDINGS
10 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

Power scaling of mini bar based high power 780 980nm...
Proceedings of SPIE (February 23 2009)
Advances in fiber combined pump modules for fiber lasers
Proceedings of SPIE (February 23 2009)
Wavelength stabilized high-power diode laser modules
Proceedings of SPIE (February 23 2009)
Stable and compact mounting scheme for > 1kW QCW diode...
Proceedings of SPIE (February 12 2008)

Back to Top