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Updated: May 15, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Continuous-wave intra-cavity singly resonant optical parametric oscillator with resonant wave output coupling
Quan Sheng1, Xin Ding, Ce Shang
1College of Precision Instrument and Opto-electronics Engineering, Institute of Laser and Opto-electronics, Tianjin University, Tianjin 300072, China.
Optics Express
|December 25, 2012
Summary
Finite resonant wave output coupling enhances continuous-wave intra-cavity singly resonant optical parametric oscillator (CW-ICSRO) performance. This method boosts power and efficiency by suppressing back-conversion, maintaining high output even at increased pump power.
Area of Science:
- Nonlinear Optics
- Laser Physics
- Quantum Optics
Background:
- Continuous-wave intra-cavity singly resonant optical parametric oscillators (CW-ICSROs) are crucial for generating tunable laser light.
- Optimizing power and efficiency in CW-ICSROs is essential for practical applications.
- Back-conversion and threshold management are key challenges in high-power optical parametric oscillation.
Purpose of the Study:
- To investigate the impact of finite resonant wave output coupling on CW-ICSRO performance.
- To enhance both power and efficiency of CW-ICSROs.
- To suppress back-conversion and maintain high efficiency under high pump power.
Main Methods:
- Implementing finite resonant wave output coupling in a CW-ICSRO setup.
- Utilizing a signal wave output coupler with a transmission (T) of 9.6%.
- Analyzing the effects of output coupling on the singly resonant optical parametric oscillator (SRO) threshold and down-conversion efficiency.
Main Results:
- The SRO threshold was determined to be 2.46 W with the 9.6% output coupler.
- A maximum down-conversion efficiency of 72.9% was achieved at a pump power of 21.4 W.
- Obtained 1.43 W idler power at 3.66 μm and 5.03 W signal power at 1.5 μm, yielding a 30.2% total extraction efficiency.
Conclusions:
- Finite resonant wave output coupling effectively enhances CW-ICSRO power and efficiency.
- This technique suppresses back-conversion under high pump power without raising the threshold via defocusing.
- The method extends the high-efficiency operating range of CW-ICSROs while retaining their low-threshold advantage.
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