• 한국광학회지
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• 제14권2호
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• pp.175-183
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• 2003

Kerr 매질로 구성된 비선형 간섭계의 파라메트릭 증폭을 자기위상변조(self-phase modulation)를 이용하여 구하고, 사광자혼합(four-wave mixing)의로 구한 것과 등가임을 보여 파라메트릭 이득 발생에 적합함을 보였다. 또한 빛의 전파 거리에 대한 파워 이득의 변화율을 구하여 비선형 팔의 길이에 따라 이득이 포화됨을 보이고, 파라메트릭 증폭의 대역폭 특성을 비축퇴사광자혼합(nondegenerated four-wave mixing)을 통해 분석하였다. 수치해석을 통해 자기위상변조로 구한 파라메트릭 증폭의 여러 특성을 분석하여, 전광증폭기(all-optical amplifier)와 같은 전광소자의 분석 및 설계에 적용될 수 있음을 보였다.

• Journal of the Optical Society of Korea
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• 제1권1호
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• pp.1-4
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• 1997

The theoretical limit of the noise correlation between the signal and idler outputs of a nondegenerate optical parametric amplifier (NOPA) with a coherent state signal and vacuum state idler input can be enhanced if a non-vacuum coherent state idler input is employed. By choosing a balanced signal and idler input, the noise correlation is $1/{({\root}g + {\root}{g-1})}^2$, where g is the intensity gain of the NOPA, and that is superior to the prediced outputs with single signal input by approximately 3dB. The result is applicable to all the schemes that use the NOPA to produce a sub-shot noise light generation such as feed-back or feed-forward control.

• Current Optics and Photonics
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• 제5권2호
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• pp.186-190
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• 2021

In this study, a compact, picosecond, mid-infrared 3.8 ㎛ MgO:PPLN optical parametric oscillator (OPO) laser output with high peak power is realized using a master oscillator power amplifier (MOPA) 1 ㎛ solid-state laser seeded by a picosecond fiber laser as the pump source. The pump source was a 50 MHz and 10 ps fiber seed source. After AOM pulse selection and two-stage solid-state amplification, a 1,064 nm laser output with a repetition frequency of 1-2 MHz, pulse width of 9.5 ps, and a maximum average power of 20 W was achieved. Furthermore, a compact short cavity with a unsynchronized pump is adopted through the design of an OPO cavity structure. When the injection pump power was 15 W and the repetition frequency was 1 MHz, the average output power of idler light was 1.19 W, and the corresponding peak power was 119 kW. The optical conversion efficiency was 7.93%. When the repetition frequency was increased to 2 MHz, the average output power of idler light was 1.63 W, the corresponding peak power was 81.5 kW, and the optical conversion efficiency was 10.87%. At the same time, the output wavelength was measured at 3,806 nm, and the beam quality was MX2 = 3.21 and MY2 = 3.34.