Design and Construction of an Affordable Adjustable Repetition-Rate Optical Frequency Comb
SEP 17, 2025
JURPA 2025 Cover.
We designed and built an adjustable repetition-rate optical frequency comb using off-the-shelf components with several improvements to an established erbium fiber design. This design, built fully by an undergraduate, was assembled at a fraction of the cost of a commercial comb. This comb has a repetition rate of roughly 100 MHz with a tuning range of 3 MHz. A stabilization control loop for frep achieved long-term drifts of < 1 Hz over several days. This comb will eventually be implemented for use in dual-comb spectroscopy.
