Open AccessPhase-locked two-branch erbium-doped fiber laser system for long-term precision measurements of optical frequencies
Author(s) -
Florian Adler,
Konstantinos Moutzouris,
Alfred Leitenstorfer,
H. Schnatz,
B. Lipphardt,
G. Grosche,
F. Tauser
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.005872
Subject(s) - optics , femtosecond , laser , frequency comb , materials science , metrology , phase noise , fiber laser , optical amplifier , amplifier , optical fiber , resonator , optoelectronics , physics , cmos
We present a highly versatile approach to the application of femtosecond Er:fiber lasers in optical frequency metrology. Our concept relies on the implementation of two parallel amplifiers, seeded by a single master oscillator. With the comb spacing locked to a frequency of 100 MHz, we apply the output from the first amplifier to generate a feedback signal to achieve a simultaneous phase-lock for the comb offset frequency. The output of the independently configurable second amplifier enables precision frequency measurements in the visible and near-infrared. As a first application, we continuously measure the absolute frequency of a resonator-stabilized diode laser over a period of 88 hours.