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Updated: Jul 8, 2026
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Toward an optical synthesizer: a single-frequency parametric oscillator using periodically poled LiNbO(3)
Optics Letters
|January 12, 2008
Summary
We demonstrated a stable, tunable singly resonant optical parametric oscillator (SRO) using a novel periodically poled lithium niobate chip. This laser system offers high spectral purity and frequency stability for tunable light generation.
Area of Science:
- Nonlinear Optics
- Laser Physics
- Materials Science
Background:
- Quasi-phase-matched optical parametric oscillators (OPOs) are crucial for generating tunable laser light.
- Achieving single-frequency, stable, and widely tunable output remains a key challenge in OPO development.
Purpose of the Study:
- To demonstrate single-frequency operation of a continuous-wave (cw) quasi-phase-matched singly resonant optical parametric oscillator (SRO).
- To achieve widely tunable output in the near-infrared spectrum using a novel multigrating chip.
- To investigate the spectral purity and frequency stability of the SRO output.
Main Methods:
- Utilized a periodically poled lithium niobate (PPLN) multigrating chip for quasi-phase-matching.
- Employed a single-frequency miniature Nd:YAG ring laser as the pump source.
- Resonated the pump wave within the SRO cavity to achieve a low threshold.
Main Results:
- Achieved widely tunable output: 1.66–1.99 µm (signal) and 2.29–2.96 µm (idler).
- Obtained high spectral purity and frequency stability (<10 MHz/min) due to the single-frequency pump.
- Demonstrated continuous tuning over 2 GHz without mode hops.
- Attained a minimum SRO threshold of 260 mW by resonating the pump wave.
Conclusions:
- The developed PPLN-based SRO provides a versatile platform for generating tunable, high-quality laser light.
- The system's stability and tunability make it suitable for various spectroscopic and photonic applications.
- Resonating the pump wave is an effective method for reducing the SRO threshold.
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