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Noise characterization of femtosecond fiber Raman soliton lasers

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4 Author(s)
Keller, U. ; Edward L. Ginzton Lab., Stanford Univ., CA, USA ; Li, K.D. ; Rodwell, M. ; Bloom, D.M.

The broadband amplitude noise and phase noise (timing jitter) measured in femtosecond fiber Raman soliton lasers is discussed. For a single-pass compressor using 300 m of either standard single-mode fiber or polarization preserving fiber, white amplitude noise >or=50 dB above shot noise at 2 mA photocurrent was measured, for frequencies higher than approximately 100 kHz. This is approximately=30 dB larger than the amplitude noise observed from fiber grating pulse compressors. The timing jitter increases with pump power, and at 1.6 W pump power, 5.2 ps r.m.s. timing jitter was measured, given approximately=2 ps jitter from the Nd:YAG pump. Longer fibers in the single-pass compressor do not affect the amplitude noise, but increase the timing jitter even further. A synchronously pumped ring cavity reduced the timing jitter substantially, but did not significantly improve the amplitude noise.<>

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Quantum Electronics, IEEE Journal of  (Volume:25 ,  Issue: 3 )