Duration Switchable High-Energy Passively Mode-Locked Raman Fiber Laser Based on Nonlinear Polarization Evolution

Author

Jun Liu ; Yu Chen ; Pinghua Tang ; Lili Miao ; Chujun Zhao ; Shuangchun Wen ; Dianyuan Fan

Author_Institution

Key Lab. of Optoelectron. Devices & Syst., Shenzhen Univ., Shenzhen, China

Volume

7

Issue

5

fYear

2015

Firstpage

1

Lastpage

7

Abstract

We experimentally demonstrate a stable passively mode-locked Raman fiber laser delivering high-energy pulses that can be switched between the regime of hundreds of nanoseconds and that of picoseconds by the nonlinear polarization rotation technique. Maximum average output power values of 304 and 53 mW are obtained, respectively, for the two typical mode-locking states with the pulse duration of 500 ns and 180 ps at the fundamental repetition rate of 275 kHz. The corresponding single pulse energy is as much as 1.1 μJ and 193 nJ, respectively. To the best of our knowledge, this is the highest pulse energy achieved from mode-locked Raman fiber lasers reported so far.

Keywords

Raman lasers; fibre lasers; laser mode locking; laser stability; optical pulse generation; Raman fiber laser; duration switching; high-energy passive mode-locking; nonlinear polarization evolution; nonlinear polarization rotation; power 304 mW; power 53 mW; time 180 ps; time 500 ns; Cavity resonators; Optical fiber amplifiers; Optical fiber couplers; Optical fiber dispersion; Optical fiber polarization; Power generation; Stimulated emission; Raman fiber laser; high energy; mode-locking; nonlinear polarization rotation;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2015.2477515

Filename

7247636