Dutta, Debjit and Paul, Mukul Chandra and Dhar, Anirban and Das, Shyamal and Farid, Muhammad Farid Mohd and Latiff, Anas Abdul and Ahmad, Harith and Harun, Sulaiman Wadi (2019) Nanosecond pulse laser generation at 1.55 and 2 mu m regions by integrating a piece of newly developed chromium-doped fiber-based saturable absorber. Applied Optics, 58 (24). pp. 6528-6534. ISSN 0003-6935

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Abstract

This paper demonstrated the nanosecond pulse laser operation at 1.55 and 2 mu m wavelength regions using a newly develop chromium-doped fiber (CrDF) as a saturable absorber (SA) to convert efficiently continuous-wave laser operation to nanosecond pulse laser operation. The laser uses an erbium-doped fiber (EDF) and thulium-doped fiber as the gain medium. A piece of 10 cm long CrDF was integrated into both laser cavities to generate nanosecond pulse laser operation. In 1.55 region generation, an additional single-mode fiber (SMF) 100 m long was added into the EDF laser cavity. Stable pulse generation occurred at a repetition rate of 1 MHz with a pulse width of 432 ns and a signal-to-noise ratio (SNR) of 66 dB. The highest peak power of 24 mW was obtained at 142 mW pump power. In 2 mu m region generation, the obtained repetition rate was 10 MHz with a pulse width and SNR of 59 ns and 41 dB, respectively. The highest peak power was only 8.3 mW. By looking into the findings, the newly developed CrDF SA has a potential to be further enhanced toward better generation of ultrashort pulse fiber lasers. (C) 2019 Optical Society of America

Item Type:	Article
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	14 Nov 2019 07:05
Last Modified:	14 Nov 2019 07:05
URI:	http://cgcri.csircentral.net/id/eprint/4594

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