^87Rb-stabilized 375-MHz Yb:fiber femtosecond frequency comb

Abstract

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Atomically referenced 1-GHz optical parametric oscillator frequency comb

“…An interferometer was constructed in order to obtain a beat frequency between the Nth mode of the Ti:sapphire laser ν N and an eternal cavity diode laser (ECDL) dither locked to the 87 Rb F = 2 → F´ = 2, 3 cross-over peak near 780.2 nm, which has a theoretical absolute frequency of 384,227,981.9 MHz [20,21], denoted by ν Rb . A partial reflector was used to couple 95% of the pump power (1.33 W) into the OPO, with the remaining 5% (0.07 W) coupled into a 2-m length of FC/APC single-mode patch cord (Thorlabs, P3-630AR-2).…”

Tailored Design of Mode-Locking Dynamics for Low-Noise Frequency-Comb Generation

“…In contrast, Ybfiber lasers surpass Er-fiber lasers in almost every technical metric, such as power, power efficiency, pulse energy, and minimum-achievable pulse duration. Despite these advantages, few frequency combs based on Yb-fiber lasers have been demonstrated [14][15][16][17][18][19][20][21][22], in contrast to hundreds of reports of the use of Er-fiber lasers. Even though excellent results were demonstrated in Ref.…”

“…Follow-up studies on Yb-fiber combs have, in contrast, achieved more modest performance, including pulse durations exceeding 100 fs. Furthermore, none of these [14][15][16][17][18][19][20][21][22] were used to make absolute-frequency measurements or were used in an application after being linked to an absolute-frequency reference.…”

Carrier-Envelope Offset Stabilized Ultrafast Diode-Pumped Solid-State Lasers

“…As the pump frequency coincides in this case with one line of the comb spectrum, it directly controls the offset frequency [33]. Such a scheme that circumvents the need for a coherent octave-spanning spectrum has also been applied in a few cases with fiber modelocked lasers [34,35], but we are not aware of any implementation with a DPSSL comb. Furthermore, this approach generally leads to less accurate comb frequencies.…”