Theory of Parametric Oscillator Threshold with Single-Mode Optical Masers and Observation of Amplification in LiNb O 3
Theory of Parametric Oscillator Threshold with Single-Mode Optical Masers and Observation of Amplification in LiNb O 3
复制标题
单模光学微波激射参量振荡器阈值理论及LiNb O 3 放大观测
DOI：
10.1103/physrev.146.187
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发表时间：
1966
期刊：
影响因子：
--
通讯作者：
A. Ashkin
中科院分区：
文献类型：
--
作者：
G. Boyd;A. Ashkin
Theoretical and experimental results are given on cw parametric amplification and oscillation. Theoretical calculations incorporating Gaussian-mode theory into parametric-amplifier theory indicate that continuous parametric oscillation in LiNb${\mathrm{O}}_{3}$ using a gas-laser pump source should be achievable with tens of milliwatts of pump power. The requirements for achieving simultaneous resonance of signal and idler frequencies under phase-matched conditions for parametric oscillators are discussed. The effects of varying crystal temperature, electric field, and pump frequency to satisfy these requirements are included. The experiments involved the measurement of difference-frequency power at 0.9299 \ensuremath{\mu} (10 754 ${\mathrm{cm}}^{\ensuremath{-}1}$) produced in LiNb${\mathrm{O}}_{3}$ by mixing a signal at 1.1526 \ensuremath{\mu} (8676 ${\mathrm{cm}}^{\ensuremath{-}1}$) from the He-Ne laser with a pump at 0.5147 \ensuremath{\mu} (19 430 ${\mathrm{cm}}^{\ensuremath{-}1}$) from an argon ion laser. The LiNb${\mathrm{O}}_{3}$ crystal was adjusted in temperature so as to obtain phase matching normal to its optic axis, thus avoiding the deleterious effects of double refraction. The observed amplification was found to be in agreement with theory. Experimental results are given demonstrating low-loss resonators for the signal and idler frequencies, the loss being approximately 1% per pass. Data showing the dependence of optical path length in an optical resonator on temperature and electric field are given. The variation of the phase-matching condition with electric field is demonstrated in a second-harmonic-generation experiment.
Theoretical and experimental results are given on cw parametric amplification and oscillation. Theoretical calculations incorporating Gaussian-mode theory into parametric-amplifier theory indicate that continuous parametric oscillation in LiNb${\mathrm{O}}_{3}$ using a gas-laser pump source should be achievable with tens of milliwatts of pump power. The requirements for achieving simultaneous resonance of signal and idler frequencies under phase-matched conditions for parametric oscillators are discussed. The effects of varying crystal temperature, electric field, and pump frequency to satisfy these requirements are included. The experiments involved the measurement of difference-frequency power at 0.9299 \ensuremath{\mu} (10 754 ${\mathrm{cm}}^{\ensuremath{-}1}$) produced in LiNb${\mathrm{O}}_{3}$ by mixing a signal at 1.1526 \ensuremath{\mu} (8676 ${\mathrm{cm}}^{\ensuremath{-}1}$) from the He-Ne laser with a pump at 0.5147 \ensuremath{\mu} (19 430 ${\mathrm{cm}}^{\ensuremath{-}1}$) from an argon ion laser. The LiNb${\mathrm{O}}_{3}$ crystal was adjusted in temperature so as to obtain phase matching normal to its optic axis, thus avoiding the deleterious effects of double refraction. The observed amplification was found to be in agreement with theory. Experimental results are given demonstrating low-loss resonators for the signal and idler frequencies, the loss being approximately 1% per pass. Data showing the dependence of optical path length in an optical resonator on temperature and electric field are given. The variation of the phase-matching condition with electric field is demonstrated in a second-harmonic-generation experiment.