High-efficiency coupled-cavity optical frequency comb generation

TL;DR

This paper introduces a dual cavity optical frequency comb generator that significantly improves efficiency and tunability of picosecond pulse generation for portable laser systems, surpassing single cavity limitations.

Contribution

The paper presents a novel dual cavity design that achieves over a hundred times higher efficiency than traditional single cavity systems, enabling portable and tunable picosecond laser sources.

Findings

Achieved over 100x higher efficiency than single cavity designs.

Demonstrated tunable pulse width via intra-cavity electro-optic modulation.

Produced GHz repetition rate picosecond pulses with a compact setup.

Abstract

We present a high efficiency source of picosecond pulses derived from a dual cavity optical frequency comb generator. This approach overcomes the limitations of single cavity comb generators that are restricted to efficiencies of a few percent. We achieve picosecond pulses with GHz repetition rates offering over a hundred times higher output efficiency than a single cavity design and demonstrate tuning of pulse width by varying the modulation depth of the intra-cavity electro-optic modulator. These results provide a wavelength-agnostic design with a compact footprint for the development of portable picosecond pulsed laser systems for timing, metrology, and LIDAR applications.