Thulium-doped all-fiber mode-locked laser based on NPR and 45°-tilted fiber grating

Li, Jianfeng, Yan, Zhijun, Sun, Zhongyuan, Luo, Hongyu, He, Yulian, Li, Zhuo, Liu, Yong and Zhang, Lin (2014). Thulium-doped all-fiber mode-locked laser based on NPR and 45°-tilted fiber grating. Optics Express, 22 (25), pp. 31020-31028.

Abstract

A nonlinear polarization rotation based all-fiber passively modelocked Tm3+-doped fiber laser is demonstrated by using a 45° tilted fiber grating (TFG) as an in-line polarizer. The 45° TFG centered at 2000 nm with polarization dependent loss (PDL) of >12 dB at 1850 nm∼2150 nm range was UV inscribed for the first time in SM28 fiber using a 244 nm Ar+ continuous wave laser and a phase mask with 25 mm long uniform pitch and titled period pattern of 33.7° with respect to the fiber axis. Stable soliton pulses centered at 1992.7 nm with 2.02 nm FWHM bandwidth were produced at a repetition rate of 1.902 MHz with pulse duration of 2.2 ps and pulse energy of 74.6 pJ. As increased pump power, the laser also can operate at noise-like regime with 18.1 nm FWHM bandwidth and pulse energy of up to 250.1 nJ. Using the same 45° TFG, both stable soliton and noise-like mode-locking centered at ∼1970 nm and ∼2050 nm, were also achieved by shortening and extending the length of Tm3+-doped fiber, respectively, exhibiting advantages of broadband and low insertion loss at 2 μm band.

Publication DOI: https://doi.org/10.1364/OE.22.031020
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Institute of Photonics
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
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Related URLs: http://www.scopus.com/inward/record.url?scp=84919697358&partnerID=8YFLogxK (Scopus URL)
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-22-25-31020 (Publisher URL)
Published Date: 2014-12-05
Authors: Li, Jianfeng
Yan, Zhijun
Sun, Zhongyuan
Luo, Hongyu
He, Yulian
Li, Zhuo
Liu, Yong
Zhang, Lin ( 0000-0002-1691-5577)

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