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Toward integrated synchronously pumped optical parametric oscillators in silicon nitride.
Optics Express
|November 23, 2021
Summary
We developed a tunable optical parametric oscillator (OPO) using silicon nitride waveguides and ultra-fast fiber lasers. This device enhances idler power by 35 dB and allows wide wavelength tuning for integrated photonics applications.
Area of Science:
- Photonics
- Integrated Optics
- Nonlinear Optics
Background:
- Optical parametric oscillators (OPOs) are crucial for generating tunable light sources.
- Silicon nitride (SiN) waveguides offer excellent nonlinear properties for integrated photonic devices.
- Four-wave mixing (FWM) in waveguides is a key nonlinear process for OPO operation.
Purpose of the Study:
- To demonstrate a tunable, hybrid waveguide-fiber optical parametric oscillator (OPO).
- To leverage ultra-fast fiber laser pumping and silicon nitride waveguides for enhanced parametric oscillation.
- To investigate the feasibility of integrating OPOs onto a single SiN chip.
Main Methods:
- Synchronous pumping of a hybrid OPO using an ultra-fast fiber laser.
- Utilizing four-wave mixing (FWM) in silicon nitride waveguides.
- Characterizing oscillation threshold and feedback loop efficiency.
Main Results:
- Achieved a 35 dB enhancement in idler spectral power density compared to spontaneous FWM.
- Demonstrated wide wavelength tuning capability over 86 nm in the O-band.
- Identified key parameters for on-chip integration of the OPO.
Conclusions:
- The hybrid waveguide-fiber OPO is a promising platform for tunable light generation.
- Silicon nitride waveguides enable efficient parametric oscillation and potential for chip-scale integration.
- The presented results pave the way for compact and versatile OPO devices.
