A micro-scale self-starting femtosecond passively mode-lock fiber laser used in ICF

Yaqian Ding; Xinxian Gong; Meishu Xing; Yubao Wang; Yuan Liu; Yang Wu; Guanghui Chen

doi:10.1117/12.2565384

17 April 2020 A micro-scale self-starting femtosecond passively mode-lock fiber laser used in ICF

Yaqian Ding, Xinxian Gong, Meishu Xing, Yubao Wang, Yuan Liu, Yang Wu, Guanghui Chen

Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 1145584 (2020) https://doi.org/10.1117/12.2565384
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China

Abstract

A short pulse self-starting mode-lock fiber laser with femtosecond pulse width and high repetition rates is demonstrated. The oscillator features linearly cavity employing WDM system with a piece of Yb doped fiber. Semiconductor saturable absorber mirror (SESAM), with modulation depth of 30% and relaxation time of 4 ps, is employed. Two chirped fiber Bragg gratings are adopted. One FBG is placed in the cavity, with wide reflection near 1053nm. It compensates for the residual dispersion of the oscillator cavity elements and serves as an output coupler for the oscillator. The other FBG is placed out of the cavity to compress the pulse width further more. The length of laser cavity is around 10m. This modelock laser can self-start. Pulses as short as 225 fs pulse widths at repetition rates of 20 MHz are generated, with average output power is about 5mW. As all of the optical fiber components are small or bendable, the size of this laser is as tiny as Φ60mm×15mm.This femtosecond mode-lock all fiber laser affords a compact, novel and high-efficiency approach as seed source in the FrontEnd in inertial confinement fusion (ICF) laser illumination schemes.

Citation Download Citation

Yaqian Ding, Xinxian Gong, Meishu Xing, Yubao Wang, Yuan Liu, Yang Wu, and Guanghui Chen "A micro-scale self-starting femtosecond passively mode-lock fiber laser used in ICF", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 1145584 (17 April 2020); https://doi.org/10.1117/12.2565384

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KEYWORDS

Fiber lasers

Femtosecond phenomena

Fiber Bragg gratings

Oscillators

Wavelength division multiplexing

Laser welding

Picosecond phenomena

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