title: Fully stabilized optical frequency comb with sub-radian CEO phase noise from a SESAM-modelocked 1.5-µm solid-state laser.
abstract: We report the first full stabilization of an optical frequency comb generated from a femtosecond diode-pumped solid-state laser (DPSSL) operating in the 1.5-μm spectral region. The stability of the comb is characterized in free-running and in phase-locked operation by measuring the noise properties of the carrier-envelope offset (CEO) beat, of the repetition rate, and of a comb line at 1558 nm. The high Q-factor of the semiconductor saturable absorber mirror (SESAM)-modelocked 1.5-µm DPSSL results in a low-noise CEO-beat, for which a tight phase lock can be much more easily realized than for a fiber comb. Using a moderate feedback bandwidth of only 5.5 kHz, we achieved a residual integrated phase noise of 0.72 rad rms for the locked CEO, which is one of the smallest values reported for a frequency comb system operating in this spectral region. The fractional frequency stability of the CEO-beat is 20‑fold better than measured in a standard self-referenced commercial fiber comb system and contributes only 10(-15) to the optical carrier frequency instability at 1 s averaging time.
authors: Laboratoire Temps-Fréquence, Université de Neuchâtel, Avenue de Bellevaux 51, CH-2000 Neuchâtel, Switzerland. stephane.schilt@unine.ch
authors: Stephane
authors: S
authors: Schilt
authors: Nikola
authors: N
authors: Bucalovic
authors: Vladimir
authors: V
authors: Dolgovskiy
authors: Christian
authors: C
authors: Schori
authors: Max C
authors: MC
authors: Stumpf
authors: Gianni
authors: G
authors: Di Domenico
authors: Selina
authors: S
authors: Pekarek
authors: Andreas E H
authors: AE
authors: Oehler
authors: Thomas
authors: T
authors: Südmeyer
authors: Ursula
authors: U
authors: Keller
authors: Pierre
authors: P
authors: Thomann
mesh_terms: D016477:Artifacts; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D007834:Lasers; D013685:Telecommunications / Q000295:instrumentation*