Low-noise narrow-linewidth fiber laser at 1550 nm (June 2003)

We present a compact integrated fiber laser with more than 200 mW of output power. It combines polarized fiber output with very narrow linewidth of less than 2 kHz. The coherence length of the laser is measured to be longer than 5 km. The laser features high mode stability of less than /spl plusmn/1...

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Bibliographic Details
Published in:Journal of lightwave technology 2004-01, Vol.22 (1), p.57-62
Main Authors: Spiegelberg, C., Jihong Geng, Yongdan Hu, Kaneda, Y., Shibin Jiang, Peyghambarian, N.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Fiber lasers
Frequency
Fundamental areas of phenomenology (including applications)
Integrated optics. Optical fibers and wave guides
Laser feedback
Laser modes
Laser noise
Laser stability
Laser tuning
Lasers
Optical and optoelectronic circuits
Optical fiber polarization
Optics
Physics
Power generation
Power lasers
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Summary:We present a compact integrated fiber laser with more than 200 mW of output power. It combines polarized fiber output with very narrow linewidth of less than 2 kHz. The coherence length of the laser is measured to be longer than 5 km. The laser features high mode stability of less than /spl plusmn/10 MHz over hours. The relative intensity noise (RIN) spectrum is dominated by a peak at the relaxation oscillation frequency and is shot-noise limited otherwise. The RIN peak at 1 MHz is reduced to /spl sim/-130 dB/Hz by integrating a negative feedback circuit. In addition to thermal wavelength tuning, the laser frequency can be modulated at a bandwidth of up to 10 kHz via the piezoelectric effect.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2003.822208