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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Continuous-wave singly-resonant optical parametric oscillator with resonant wave coupling.

G K Samanta¹, M Ebrahim-Zadeh

¹ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain.

|June 12, 2008

Summary

Finite output coupling significantly enhances continuous-wave singly-resonant optical parametric oscillators (cw SROs). This method boosts output power, efficiency, and tuning range while maintaining high pump depletions for advanced laser applications.

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Area of Science:

Nonlinear optics
Laser physics
Materials science (MgO:sPPLT)

Background:

Continuous-wave singly-resonant optical parametric oscillators (cw SROs) are crucial for generating tunable laser light.
Optimizing cw SRO performance is essential for various spectroscopic and photonic applications.
Existing cw SRO designs face limitations in output power, efficiency, and tuning range.

Purpose of the Study:

To investigate the impact of finite output coupling on cw SRO performance.
To enhance key performance metrics including output power, extraction efficiency, and tuning range.
To assess the trade-offs between enhanced performance and oscillation threshold.

Main Methods:

Implementation of finite output coupling for the resonant wave in a cw SRO.
Utilizing a MgO:sPPLT crystal as the nonlinear medium.
Pumping the SRO with a 532 nm laser source.
Characterizing output power, extraction efficiency, tuning range, pump depletion, and oscillation threshold.

Main Results:

Achieved a 1.08 W increase in total output power.
Improved total extraction efficiency by 10%.
Extended the useful tuning range by 130 nm.
Maintained high pump depletions (70%) and significant idler output power (2.59 W).
Observed a minimal 24% increase in oscillation threshold.
Demonstrated a total power of 3.6 W at 40% extraction efficiency across 848-1427 nm.
The single-frequency resonant wave exhibited higher spectral purity.

Conclusions:

Finite output coupling is a highly effective strategy for enhancing cw SRO performance.
This technique offers a significant improvement in power, efficiency, and tuning range without compromising essential operational parameters.
The output-coupled cw SRO provides a robust platform for high-power, tunable, single-frequency laser generation with superior spectral purity.