Abstract
The emission spectrum of a 10-W commercial broad-Area laser operated at full power was narrowed and stabilized by coupling an off-Axis portion of its far-field emission to a single-mode fiber Bragg grating. The feedback produced in this partial compound cavity configuration narrowed the FWHM linewidth of the laser by 7\times compared with the free-running case and stabilized its peak wavelength over a 7° temperature range. Furthermore, the feedback improved the spectral density of the emission by 2\times over a 1.5° temperature range and over most of the far-field emission angles, indicating a robust concept suitable for manufacturing. This proof-of-concept experiment can be translated into a fiber pump delivery system that can capture all the broad-Area laser (BAL) output while providing feedback to improve the spectral and potentially spatial properties of BAL emission.
Original language | English |
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Article number | 8586888 |
Pages (from-to) | 279-282 |
Number of pages | 4 |
Journal | IEEE Photonics Technology Letters |
Volume | 31 |
Issue number | 4 |
DOIs | |
Publication status | Published - 15 Feb 2019 |
Externally published | Yes |
Funding
Manuscript received October 24, 2018; revised November 21, 2018; accepted December 13, 2018. Date of publication December 24, 2018; date of current version January 29, 2019. This work was supported by University of Rochester Technology Development Fund. (Corresponding author: Jose C. Perez.) The authors are with the Institute of Optics, University of Rochester, Rochester, NY 14627 USA (e-mail: [email protected]).
Keywords
- Bragg gratings
- diode lasers
- laser stability
- semiconductor lasers