Abstract
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 π/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 fceo signal with >30-dB signal-to-noise ratio (SNR) which is suitable for frequency comb stabilization.
| Original language | English |
|---|---|
| Article number | 7823006 |
| Journal | IEEE Photonics Journal |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| State | Published - Feb 2017 |
Keywords
- Fiber Lasers
- Supercontinuum generation.
- mode-locked laser
- ultrafast laser