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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/26772
Title: Analysis of output pulse characteristics in Q-switched Yb-doped fiber laser
Authors: Upadhyaya B.N.
Kumar, Arun
Chakravarty U.
Oak S.M.
Shenoy M.R.
Thyagarajan K.
Published in: IEEE Journal of Quantum Electronics
Abstract: Characteristics of the output pulses of a high-peak-power Q-switched Yb-doped fiber laser are presented. A Q-switched fiber laser with 1.3 kW peak power and with typical pulse duration of 240 ns at 20 kHz modulation frequency was realized, variations of pulse duration, average power, peak power, and pulse energy with variation in the modulation frequency were studied. The effect of the modulation duty cycle (DC) on the Q-switched pulse characteristics was analyzed both theoretically and experimentally. It is shown that, for a particular pump power and repetition rate, the DC of modulation needs to be optimized to achieve high-peak-power single-pulse output. If the DC of modulation is long, satellite pulses of low peak power are also observed along with the main peak, when the DC is made short enough, the satellite pulses disappear and single peak pulses appear in the output. Theoretical analysis and simulation to predict the pulse build-up time, output pulse shape, and effect of modulation window time on the output pulse characteristic were carried out. Simulation results show good agreement with experimental results. This paper reported here will be useful in the development of high-peak-power Q -switched fiber lasers. © 2011 IEEE.
Citation: IEEE Journal of Quantum Electronics, 47(6): 786-794
URI: https://doi.org/10.1109/JQE.2011.2114639
http://repository.iitr.ac.in/handle/123456789/26772
Issue Date: 2011
Keywords: Active Q-switching
fiber laser
laser dynamics
Yb-doped double-clad fiber
ISSN: 189197
Author Scopus IDs: 7005524118
57223779688
57210990273
7006565222
7005876250
7007059471
Author Affiliations: Upadhyaya, B.N., Raja Ramanna Centre for Advanced Technology, Indore 452013, India
Kumar, A., Raja Ramanna Centre for Advanced Technology, Indore 452013, India
Chakravarty, U., Raja Ramanna Centre for Advanced Technology, Indore 452013, India
Oak, S.M., Raja Ramanna Centre for Advanced Technology, Indore 452013, India
Shenoy, M.R., Indian Institute of Technology Delhi, New Delhi 110016, India
Thyagarajan, K., Indian Institute of Technology Delhi, New Delhi 110016, India
Funding Details: 
Corresponding Author: Upadhyaya, B. N.; Raja Ramanna Centre for Advanced Technology, Indore 452013, India; email: bnand@rrcat.gov.in
Appears in Collections:Journal Publications [HRE]

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