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Color-switching in an optical parametric oscillator using a phase-conjugate mirror.

B E Anderson, J Zhao, Z Zhou

|November 14, 2024

Summary

This study introduces a novel phase-conjugate resonator for stable optical pulsing. This system utilizes non-degenerate four-wave mixing to create a unique resonator for advanced laser applications.

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Area of Science:

Nonlinear Optics
Quantum Optics
Laser Physics

Background:

Phase-conjugate mirrors offer unique optical properties.
Four-wave mixing (4WM) is a key nonlinear process for generating phase conjugation.
Resonator design is critical for stable laser pulse generation.

Purpose of the Study:

To construct a novel phase-conjugate resonator.
To achieve stable, alternating probe and conjugate color pulses.
To explore passive mode-locking and instability suppression.

Main Methods:

Constructed a phase-conjugate resonator using non-degenerate four-wave mixing (4WM) in rubidium vapor.
Employed a glancing-angle phase-conjugate mirror as a 100% output coupler.
Operated an optical parametric oscillator above threshold for passive mode-locking.

Main Results:

The resonator passively produced stable pulses alternating between probe and conjugate colors.
The phase-conjugate mirror effectively suppressed thermal and acoustic instabilities (MHz timescale and slower).
Demonstrated passive mode-locking in the formed optical parametric oscillator.

Conclusions:

This work presents a new method for stable pulsing using phase-conjugate optics.
The developed resonator serves as a platform for mode-locked pulses with squeezed light.
The 4WM process's demonstrated quantum correlations support potential applications in quantum information.