Optical-feedback-stabilized semiconductor frequency combs

(Princeton Docket # 19-3580)

Inventors: Gerard Wysocki, Jonas Westberg, Chu Teng

The optical-feedback-stabilized semiconductor frequency comb is a breakthrough technology that dramatically enhances the stability and operational range of chip-scale laser frequency combs. By integrating a simple, external optical feedback mechanism, this innovation enables robust, low phase-noise comb operation without the need for complex device-level modifications or costly radio-frequency (RF) stabilization electronics. This optical-feedback-stabilized frequency comb technology provides a simple, scalable, and cost-effective solution for achieving robust, low-noise operation in semiconductor laser frequency combs. It overcomes longstanding barriers in the field, enabling new applications and accelerating the adoption of chip-scale frequency combs beyond laboratory environments.

The technology uses an external cavity-formed by adding at least one partially reflective surface to the laser system-to re-inject filtered light back into the semiconductor laser. This stabilizes the frequency comb, reducing phase noise and enabling operation in regimes previously prone to instability.

APPLICATIONS

ADVANTAGES

• High-precision spectroscopy (including dual-comb spectroscopy)
• Optical frequency metrology
• Environmental and industrial sensing
• Portable and battery-powered photonic systems
• Any application requiring stable, broadband, chip-scale frequency combs

• No complex electronics needed: Stabilizes frequency combs without electronic feedback loops.
• Improved stability: Significantly reduces phase noise for reliable operation.
• Cost-effective and simple: Uses standard optical components with no intricate modifications.
• Broad compatibility: Works with various semiconductor laser types.
• Flexible and tunable: Easily adjustable external cavity parameters.
• Scalable and compact: Ideal for miniaturized, portable devices.
• Enables advanced applications: Supports high-precision spectroscopy and sensing.

Stage of Development

Experimentally Validated Prototype

Publication
Optical-feedback-stabilized quantum cascade laser frequency combs

Contact
Renee Sanchez

New Ventures & Licensing Associate • (609) 258-6762 • renee.sanchez@Princeton.edu