Abstract
By treating a regeneratively mode-locked laser with a short ring length of 5.85 m as a coupled optoelectronic (OE) RF oscillator, the microwave quality factor (
Q
R
F
) of its ring-cavity was characterized with the phase-shift approach. Specifically, the phase shift in the OE feedback loop of the mode-locked laser was varied, and the corresponding frequency shift in the photodetected first harmonic of its emitted pulse train was measured. An optical-gain enhanced
Q
R
F
of
∼
5.8
×
10
4
was measured, which is an order of magnitude larger than the
Q
R
F
estimated for the same cavity before regenerative mode-locking. The experimental results were then compared with theoretical models developed to estimate the optical-gain enhanced
Q
R
F
of coupled OE oscillators.
Funder
National Aeronautics and Space Administration
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering
Cited by
2 articles.
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