Das Chowdhury, Sourav and Shekhar, Nishant and Saha, Maitreyee and Sen, Ranjan and Pal, Mrinmay (2014) Broadband Generation by Multiple Four-Wave Mixing Process Due To ASE Q-Switching In High-Power Double-Clad Ytterbium-Doped Fiber Amplifier. In: HIGH-POWER LASERS AND APPLICATIONS VII, OCT 09-11, 2014, Beijing, Peoples Republic of China.

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Broadband output from 1060nm to 1700nm and cascaded four-wave mixing generated red light pulsing is observed in a fiber amplifier set up consisting of a 5.5m double clad, double D shaped Ytterbium doped fiber, a single clad passive fiber for excess pump absorption and a splitter, both with and without a CW seed. Self-pulsing occurs from ASE due to passive Q-switching by saturable absorption effect of the active fiber and also depends on splice loss. The pulses generate broadband output by multiple four-wave mixing process with maximum broadening efficiency near 1300nm which is the zero dispersion wavelength for silica fiber. Pulses traveling both in forward and backward direction have enough peak power and energy to damage splice points and fiber components. When seeded the self-pulsing and broadband generation is often suppressed but again generate at increased pump powers.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Conference on High-Power Lasers and Applications VII, Beijing, PEOPLES R CHINA, OCT 09-11, 2014
Subjects: Processing Science
Divisions: Fiber Optics and Photonics
Depositing User: Bidhan Chaudhuri
Date Deposited: 25 Mar 2015 10:25
Last Modified: 11 Mar 2016 18:10
URI: http://cgcri.csircentral.net/id/eprint/2763

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