High-power on-chip hyperparametric oscillator.

Area of Science:

• Photonics and Nonlinear Optics
• Integrated Optics
• Semiconductor Devices

Background:

• Optical hyperparametric oscillators (H-OPO) are valuable light sources due to tunable wavelength and broad bandwidth.
• On-chip H-OPO generation is key for miniaturized, low-power optical devices.
• Previous H-OPO technologies faced limitations in achieving high single-frequency output power at high pump power.

Purpose of the Study:

• To overcome the limitations of traditional on-chip H-OPO power output.
• To develop a high-power, miniaturized, and wavelength-tunable light source.
• To enable new applications requiring on-chip light generation beyond conventional amplifiers.

Main Methods:

• Utilized a silicon nitride microring resonator with periodically adjusted intrinsic loss.
• Implemented optimized coupling strength to suppress mode competition.
• Investigated the impact of loss modulation on H-OPO performance at high pump power.

Main Results:

• Achieved a record on-chip signal power of 215 mW.
• Reached a peak total conversion efficiency of 0.75.
• Demonstrated wavelength tunability of approximately 5 nm.

Conclusions:

• The developed method efficiently suppresses mode competition in H-OPOs at high pump power.
• This work presents a significant advancement in on-chip, high-power light source technology.
• The findings pave the way for novel optical devices with extended wavelength ranges.