Femtosecond diode-pumped solid-state laser with a repetition rate of 48 GHz

Pekarek, S.; Klenner, Alexander; Südmeyer, Thomas; Fiebig, Christian; Paschke, K.; Erbert, G.; Keller, U.

doi:10.1364/oe.20.004248

Cited by 53 publications

(31 citation statements)

References 26 publications

(17 reference statements)

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“…Similar systems with 80 W of power have been demonstrated with carrier envelope phase locked oscillators (Ruehl et al, 2010) suggesting the required amplification process is not inconsistent with low-phase-noise pulse trains. Another promising technology in this area is thin disk lasers, which have shown the ability to generate very high repetition rate pulse trains (>1 GHz) (Pekarek et al, 2012) and generate reasonably high average powers (>100W) (Baer et al, 2010).…”

Section: B State Of the Art For High Peak Power Lasersmentioning

confidence: 99%

Dielectric laser accelerators

England¹,

Noble²,

Bane³

et al. 2014

Rev. Mod. Phys.

332

184

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The use of infrared lasers to power optical-scale lithographically fabricated particle accelerators is a developing area of research that has garnered increasing interest in recent years. We review the physics and technology of this approach, which we refer to as dielectric laser acceleration (DLA). In the DLA scheme operating at typical laser pulse lengths of 0.1 to 1 ps, the laser damage fluences for robust dielectric materials correspond to peak surface electric fields in the GV/m regime. The corresponding accelerating field enhancement represents a potential reduction in active length of the accelerator between 1 and 2 orders of magnitude. Power sources for DLA-based accelerators (lasers) are less costly than microwave sources (klystrons) for equivalent average power levels due to wider availability and private sector investment. Due to the high laser-to-particle coupling efficiency, required pulse energies are consistent with tabletop microJoule class lasers. Combined with the very high (MHz) repetition rates these lasers can provide, the DLA approach appears promising for a variety of applications, including future high energy physics colliders, compact light sources, and portable medical scanners and radiative therapy machines.

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Section: B State Of the Art For High Peak Power Lasersmentioning

confidence: 99%

Dielectric laser accelerators

England¹,

Noble²,

Bane³

et al. 2014

Rev. Mod. Phys.

332

184

View full text Add to dashboard Cite

show abstract

“…Such a requirement has stimulated recent research endeavors in developing femotosecond lasers with >1 GHz repetition rate. Although 10 GHz repetition-rate operation has been achieved in a Kerr-lens mode-locked Ti:sapphire laser (and frequency comb) [2], scaling up repetition-rate is being intensively pursued in femtosecond lasers incorporating Yb-doped gain materials which can be directly diode pumped and exhibit excellent power scalability [3][4][5][6][7][8][9][10]. A survey of high repetition-rate (>1 GHz) femtosecond lasers with Yb-doped gain media (Table 1) shows that most of these lasers are of relative narrow bandwidth supporting pulse durations of well-exceeding 100 fs.…”

Section: Introductionmentioning

confidence: 99%

Frequency comb based on a narrowband Yb-fiber oscillator: pre-chirp management for self-referenced carrier envelope offset frequency stabilization

Lim¹,

Chen²,

Chang³

et al. 2013

Opt. Express

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Laser frequency combs are normally based on mode-locked oscillators emitting ultrashort pulses of ~100-fs or shorter. In this paper, we present a self-referenced frequency comb based on a narrowband (5-nm bandwidth corresponding to 415-fs transform-limited pulses) Yb-fiber oscillator with a repetition rate of 280 MHz. We employ a nonlinear Ybfiber amplifier to both amplify the narrowband pulses and broaden their optical spectrum. To optimize the carrier envelope offset frequency (f CEO ), we optimize the nonlinear pulse amplification by pre-chirping the pulses at the amplifier input. An optimum negative pre-chirp exists, which produces a signal-to-noise ratio of 35 dB (100 kHz resolution bandwidth) for the detected f CEO . We phase stabilize the f CEO using a feed-forward method, resulting in 0.64-rad (integrated from 1 Hz to 10 MHz) phase noise for the in-loop error signal. This work demonstrates the feasibility of implementing frequency combs from a narrowband oscillator, which is of particular importance for realizing large line-spacing frequency combs based on multi-GHz oscillators usually emitting long (>200 fs) pulses.

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“…The significantly simplified astro-comb requires only one FP cavity and becomes more reliable. Several types of femtosecond mode-locked lasers have demonstrated operation with a >1 GHz repetition rate [9][10][11][12][13][14][15]. Up to date, however, fully stabilized frequency combs with >1 GHz comb spacing are only implemented based on Ti:Sapphire lasers (10 GHz) [16], Yb-fiber lasers (1 GHz) [17], and most recently Er-fiber lasers (1 GHz) [18].…”

mentioning

confidence: 99%

3 GHz, fundamentally mode-locked, femtosecond Yb-fiber laser

Chen

Chang

et al. 2012

Opt. Lett.

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We demonstrate a fundamentally mode-locked Yb-fiber laser with 3 GHz repetition rate and ∼206 fs pulse duration. The laser incorporates two enabling technologies: a 1 cm heavily Yb-doped phosphate glass fiber as the gain medium and a high-dispersion (−1300 fs 2 ) output coupler to manage cavity dispersion. The oscillator self-starts and generates up to 53 mW average power. © 2012 Optical Society of America OCIS codes: 140.3510, 060.3510, 140.4050, 140.7090, 320.7090. High-repetition-rate (>1 GHz) lasers with femtosecond pulse duration are required in many applications. For nonlinear bio-optical imaging (e.g., two-photon fluorescence excitation microscopy), in which photo-induced damage is caused by pulse energy rather than average power, increasing pulse repetition rate will improve signal-to-noise ratio and reduce data acquisition time [1]. Frequency combs, which are achieved by fully stabilizing both the repetition rate and the carrier-envelope offset frequency of multi-GHz lasers, exhibit large line spacing (equal to the laser's repetition rate) that may permit access to and manipulation of each individual comb line. Such capabilities have opened numerous frequency domain applications, including optical arbitrary waveform generation, high-speed analog-to-digital conversion, and high-resolution spectroscopy [2]. Of particular importance is precision calibration of astronomical spectrographs to search for Earth-like exoplanets, which normally requires femtosecond laser frequency combs with >15 GHz line spacing ("astro-comb") [3][4][5][6][7][8]. Current implementation of an astro-comb relies on using multiple Fabry-Perot (FP) filtering cavities to multiply the line spacing of a frequency comb based on low-repetition-rate lasers. For example, Wilken et al.'s astro-comb system employed a 250 MHz Yb-fiber laser as the front end, followed by three cascade FP filtering cavities for line-space multiplication [7]. Stabilizing these FP cavities, locking them to the frequency comb, and preventing parasitic cavities between two FP cavities constitute the major challenge in constructing a practical astro-comb. Such an issue can be alleviated by employing a frequency comb based on a femtosecond laser operating at a much higher repetition rate (e.g., 3-10 GHz). The significantly simplified astro-comb requires only one FP cavity and becomes more reliable. Several types of femtosecond mode-locked lasers have demonstrated operation with a >1 GHz repetition rate [9][10][11][12][13][14][15]. Up to date, however, fully stabilized frequency combs with >1 GHz comb spacing are only implemented based on Ti:Sapphire lasers (10 GHz) [16], Yb-fiber lasers (1 GHz) [17], and most recently Er-fiber lasers (1 GHz) [18]. Among them, Yb-fiber laser frequency combs possess superior power scalability thanks to the rapid development of double-clad Yb-fibers and high-brightness pump diodes, as well as the Yb-fiber's high pump-to-signal conversion efficiency (∼80%). For example, Yb-fiber laser frequency combs with 80 W average power have been d...

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Femtosecond diode-pumped solid-state laser with a repetition rate of 48 GHz

Cited by 53 publications

References 26 publications

Dielectric laser accelerators

Dielectric laser accelerators

Frequency comb based on a narrowband Yb-fiber oscillator: pre-chirp management for self-referenced carrier envelope offset frequency stabilization

3 GHz, fundamentally mode-locked, femtosecond Yb-fiber laser

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