Octave-Spanning Supercontinuum Generation From an NALM Mode-Locked Yb-Fiber Laser System

Octave-Spanning Supercontinuum Generation From an NALM Mode-Locked Yb-Fiber Laser System

We demonstrate a broadband all polarization-maintaining Yb-fiber laser system that provides 137-nJ pulse at 140-fs duration. The pulses are generated in a passively mode-locked laser in which the nonlinear amplifying loop mirror acts as the mode locker, an integrated nonreciprocal device biases &...

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Bibliographic Details
Main Authors: Zhengru Guo, Qiang Hao, Song Yang, Tingting Liu, Hong Hu, Heping Zeng
Format: Article
Language:English
Published: IEEE 2017-01-01
Series:IEEE Photonics Journal
Subjects:
Fiber Lasers
mode-locked laser
ultrafast laser
supercontinuum generation.
Online Access:https://ieeexplore.ieee.org/document/7823006/
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Summary:We demonstrate a broadband all polarization-maintaining Yb-fiber laser system that provides 137-nJ pulse at 140-fs duration. The pulses are generated in a passively mode-locked laser in which the nonlinear amplifying loop mirror acts as the mode locker, an integrated nonreciprocal device biases &#x03C0;&#x002F;2 phase shift to reduce the mode locking threshold, and a pair of gratings are involved to force the oscillator operating in its quietest mode. Self-started mode locking is first achieved in multiple-pulse regime with 250-mW pump power, and stable single-pulse operation with 1.1-ps pulse duration, 75-pJ energy, and 29-nm spectral width are obtained subsequently when the pump power is decreased to 135 mW. Being amplified and spectral broadened, the laser pulses lead to an <italic>f</italic><sub>ceo </sub> signal with &#x003E;30-dB signal-to-noise ratio (SNR) which is suitable for frequency comb stabilization.
ISSN:1943-0655

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