Das Chowdhury, Sourav and Pal, Atasi and Pal, Debasis and Chatterjee, Sayan and Paul, Mukul Chandra and Sen, Ranjan and Pal, Mrinmay (2017) High repetition rate gain-switched 1.94 mu m fiber laser pumped by 1.56 mu m dissipative soliton resonance fiber laser. Optics Letters, 42 (13). pp. 2471-2474. ISSN 0146-9592

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A dissipative soliton resonance (DSR) mode-locked Er:Yb fiber laser has been used to pump a thulium fiber laser to generate gain-switched pulses at high repetition rates. Here 412 ns long DSR pulses with a center wavelength of around 1.56 mu m at a repetition rate of 410 kHz have been fed to a thulium fiber laser, resulting in generation of gain-switched pulses at 1.94 mu m. The minimum pulse width achieved was 256 ns with an average power of 4.6 W at 66% slope efficiency. Gain-switched pulses at 520 kHz and 750 kHz were generated through changing the pump pulse repetition rate by modifying the DSR cavity. To the best of our knowledge, this is the first demonstration of a high repetition rate gain-switched thulium fiber laser pumped by a DSR mode-locked fiber laser. As DSR pulses can be generated with high seed average power and energy independent of the operating wavelength regime as well as mode-locking technique, the proposed method can be applied to generate gain-switched pulses at high repetition rates and various wavelengths without the need of any optical or electrical modulators. (C) 2017 Optical Society of America.

Item Type: Article
Subjects: Processing Science
Divisions: Fiber Optics and Photonics
Depositing User: Bidhan Chaudhuri
Date Deposited: 23 Jan 2018 07:13
Last Modified: 23 Jan 2018 07:13
URI: http://cgcri.csircentral.net/id/eprint/4010

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