Tunable single-frequency cascaded Stokes order generation in monolithic diamond Raman resonators

Area of Science:

• Integrated photonics
• Nonlinear optics
• Quantum optics

Background:

• Cascaded Raman scattering is a key nonlinear optical process for frequency conversion.
• Fabry-Perot resonators enhance light-matter interactions for precise spectral control.
• Generating tunable, frequency-stabilized light sources is crucial for spectroscopy and quantum information.

Purpose of the Study:

• To demonstrate a novel method for producing widely spaced, frequency-stabilized optical pulses.
• To precisely tune these pulses using temperature control of a diamond Fabry-Perot resonator.
• To investigate the spectral characteristics and stability of the generated Stokes pulses.

Main Methods:

• Utilized a cascaded Raman process within a 7-mm integrated diamond Fabry-Perot resonator.
• Employed a visible spectral range pump source at 532 nm.
• Achieved pulse tuning by precisely adjusting the resonator's temperature.

Main Results:

• Simultaneously generated single axial Stokes modes with narrow linewidths (300 MHz and 180 MHz) at 573 nm and 623 nm, respectively.
• Demonstrated over 20 GHz and 40 GHz tuning range for the first and second Stokes orders.
• Achieved sub-50 MHz (RMS) center-frequency fluctuations for the second Stokes order pulses.

Conclusions:

• The integrated diamond resonator system effectively produces tunable, frequency-stabilized optical pulses via cascaded Raman scattering.
• Temperature tuning offers precise control over the spectral properties of the generated light.
• This technology holds promise for applications requiring stable, spectrally versatile light sources.