Research on all-fiber Q-switched fiber laser based on the hi-bi fiber Sagnac loop filter

Chen Yong; Xiaopeng Dong; Lin Jun

doi:10.1117/12.522127

12 May 2004 Research on all-fiber Q-switched fiber laser based on the Hi-Bi fiber Sagnac loop filter

Chen Yong, Xiaopeng Dong, Lin Jun

Proceedings Volume 5280, Materials, Active Devices, and Optical Amplifiers; (2004) https://doi.org/10.1117/12.522127
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China

Abstract

The Sagnac loop filter composed of the highly birefringent (Hi-Bi) fiber and a 3-dB coupler has been employed in the novel structure of Q-switched fiber laser in this paper. We use square-wave-driven PZT to modulate the filter, whose period is changed according to that of the wave. Therefore, the Hi-Bi fiber Sagnac loop filter will not only fulfill the function of choosing the wavelength of the laser but also serve as a Q-switching that changes the transmission ratio of the whole resonator. In the experiment of Q-switched fiber laser based on the ring resonator, the output laser pulse remains stable at an external frequency of 3 kHz-8 kHz. When the frequency is 3.2 KHz and the pump power is 19mw, the FWHM (Full Width at Half Maximum) of the pulse is approximately 10.5μs, and the average output power is 685.3μW, and the peak power is 41.1mW. Meanwhile, another novel structure of Q-switched fiber with linear resonator has also been studied in the paper.

Citation Download Citation

Chen Yong, Xiaopeng Dong, and Lin Jun "Research on all-fiber Q-switched fiber laser based on the Hi-Bi fiber Sagnac loop filter", Proc. SPIE 5280, Materials, Active Devices, and Optical Amplifiers, (12 May 2004); https://doi.org/10.1117/12.522127

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KEYWORDS

Optical filters

Resonators

Fiber lasers

Q switched lasers

Q switched fiber lasers

Ferroelectric materials

Pulsed laser operation

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