High power femtosecond semiconductor lasers based on saw-toothed master-oscillator power-amplifier system with compressed ASE | Zendy

Yanjing Wang | Zendy; Xin Zhang | Zendy; Cunzhu Tong | Zendy; Lijie Wang | Zendy; ShiLi Shu | Zendy; Si-Cong Tian | Zendy; Lijun Wang | Zendy

Open Access

High power femtosecond semiconductor lasers based on saw-toothed master-oscillator power-amplifier system with compressed ASE

Author(s) -

Yanjing Wang,

Xin Zhang,

Cunzhu Tong,

Lijie Wang,

ShiLi Shu,

Si-Cong Tian,

Lijun Wang

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.385576

Subject(s) - materials science , optics , laser , amplified spontaneous emission , femtosecond , disk laser , amplifier , optical amplifier , semiconductor laser theory , optoelectronics , semiconductor , physics , cmos

High power femtosecond semiconductor laser based on saw-toothed taper mode-locked laser and amplifier was demonstrated with compressed amplified spontaneous emission (ASE). The external-cavity mode-locked taper laser generated the clean optical pulses without any sub-pulse components. A semiconductor optical amplifier (SOA) with tilted taper waveguide and saw-toothed edge reduced evidently the ASE background. The saw-tooth microstructures were optimized and it was found that the saw-tooth of right-right angled triangle showed the best effect. The ratio of the maximum intensity to background radiation was increased by 21.9% and the power was increased by 30.5% due to the saw-tooth microstructure in the SOA. The pulse duration of 495 fs and a peak power over 1.5 kW with repetition rate of 579 MHz were realized after a double-pass grating compressor.

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