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http://dx.doi.org/10.3807/KJOP.2003.14.2.189

Improvement of extinction ratio of amplified pulses by incorporating a nonlinear optical loop mirror  

Kim, Byung-Jun (Department of Physics, Chungnam National University)
Choi, Hyun-Beom (Department of Physics, Chungnam National University)
Lee, Han-Hyub (Department of Physics, Chungnam National University)
Lee, Dong-Han (Department of Physics, Chungnam National University)
Kim, Dae-Yun (Agency for Defense Development)
Kwon, Il-Bum (Korea Research Institute of Standards and Science)
Publication Information
Korean Journal of Optics and Photonics / v.14, no.2, 2003 , pp. 189-193 More about this Journal
Abstract
A two-stage erbium-doped fiber amplifier (EDFA) with a band pass filter is used to get optical pulses of high peak value. The pulse signal has a 32 ㏈ extinction ratio, 125 W peak power and 79 ㎽ pulse off power. A nonlinear optical loop mirror (NOLM) is used to lower the pulse off power so as to increase the extinction ratio. The pulse signal after the NOLM has a 50.4 ㏈ extinction ratio, 35 W peak power and 0.3 ㎽ pulse off power.
Keywords
extinction ratio; NOLM; EDFA; pulse amplification;
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