C-cavity fiber laser employing a chirped fiber Bragg grating for electrically gated wavelength tuning

We present a novel C-cavity concept for tunable lasers. The laser is based on a semiconductor optical amplifier (SOA), serving both as a gain medium as well as a modulator, and a chirped fiber Bragg grating (C-FBG) which acts as the end mirrors on both cavity ends. Driving the SOA with a pulse pair...

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Bibliographic Details
Published in:Optics express 2020-03, Vol.28 (7), p.9208-9215
Main Authors: Lindberg, Robert, Laurell, Fredrik, Fröjdh, Krister, Margulis, Walter
Format: Article
Language:English
Subjects:
Cavity fibers
Chirped fiber Bragg grating
Different operating conditions
Fiber amplifiers
Fiber Bragg gratings
Fiber lasers
Laser mirrors
Laser performance
Repetition rate
Semiconductor optical amplifiers
Time multiplexed
Tuning
Variable delays
Wavelength tuning
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Summary:We present a novel C-cavity concept for tunable lasers. The laser is based on a semiconductor optical amplifier (SOA), serving both as a gain medium as well as a modulator, and a chirped fiber Bragg grating (C-FBG) which acts as the end mirrors on both cavity ends. Driving the SOA with a pulse pair with variable delay enables wavelength tuning by targeting different regions in the C-FBG with the circulating pulse. The cavity design allows for wide tuning while maintaining a constant repetition rate, we show a tuning range of 35 nm -limited by the C-FBG's reflection bandwidth. Time-multiplexed operation with four different wavelengths is also demonstrated. Furthermore, the laser performance and dynamics under different operating conditions are analyzed and discussed.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.383398