Singly resonant cw OPO with simple wavelength tuning

Area of Science:

• Optics and Photonics
• Nonlinear Optics
• Laser Physics

Background:

• Continuous-wave optical parametric oscillators (cw OPOs) are crucial for generating tunable laser light.
• Intracavity etalons in traditional cw OPOs complicate wavelength tuning and can introduce instability.
• Developing simpler, more robust cw OPO designs is essential for various spectroscopic and photonic applications.

Purpose of the Study:

• To describe a novel singly resonant continuous-wave optical parametric oscillator (cw OPO).
• To demonstrate a simplified wavelength tuning mechanism for cw OPOs.
• To achieve watt-level output power in the mid-infrared region with high operational stability.

Main Methods:

• The study details the design of a singly resonant cw OPO.
• Wavelength tuning is achieved through temperature control of the nonlinear crystal and pump laser wavelength adjustment.
• The absence of an intracavity etalon simplifies the experimental setup and tuning procedure.

Main Results:

• The cw OPO operates without an intracavity etalon, enabling straightforward wavelength tuning.
• Watt-level output power was achieved in the mid-infrared spectral region.
• The device demonstrated reliable, mode-hop-free operation for extended periods (several hours).

Conclusions:

• The developed cw OPO offers a simplified and robust approach to tunable mid-infrared light generation.
• Eliminating the intracavity etalon enhances operational simplicity and stability.
• This technology holds promise for applications requiring stable, high-power, tunable mid-infrared sources.