Noise properties of an optical frequency comb from a SESAM-mode-locked 1.5-μm solid-state laser stabilized to the 10−13 level

Schilt, Stéphane; Dolgovskiy, Vladimir; Bucalović, Nikola; Schori, C.; Stumpf, M. C.; Domenico, G. Di; Pekarek, S.; Oehler, Andreas; Südmeyer, Thomas; Keller, U.; Thomann, P.

doi:10.1007/s00340-012-5072-z

Cited by 14 publications

(11 citation statements)

References 69 publications

(117 reference statements)

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“…[14], we demonstrated stable frequency comb generation starting from up to & 200 fs pulses from a diode-pumped Er:Yb:glass laser passively modelocked with a SESAM. Compared to fiber frequency combs, we obtained much better noise performance [15,18]. More recently, we extended this work to gigahertz Yb-doped DPSSLs with femtosecond pulses at multi-watt average output power [19,20].…”

Section: Introductionmentioning

confidence: 86%

Experimentally verified pulse formation model for high-power femtosecond VECSELs

et al. 2013

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Optically pumped vertical-external-cavity surface-emitting lasers (OP-VECSELs), passively modelocked with a semiconductor saturable absorber mirror (SESAM), have generated the highest average output power from any sub-picosecond semiconductor laser. Many applications, including frequency comb synthesis and coherent supercontinuum generation, require pulses in the sub-300-fs regime. A quantitative understanding of the pulse formation mechanism is required in order to reach this regime while maintaining stable, high-average-power performance. We present a numerical model with which we have obtained excellent quantitative agreement with two recent experiments in the femtosecond regime, and we have been able to correctly predict both the observed pulse duration and the output power for the first time. Our numerical model not only confirms the soliton-like pulse formation in the femtosecond regime, but also allows us to develop several clear guidelines to scale the performance toward shorter pulses and higher average output power. In particular, we show that a key VECSEL design parameter is a high gain saturation fluence. By optimizing this parameter, 200-fs pulses with an average output power of more than 1 W should be possible.

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Section: Introductionmentioning

confidence: 86%

Experimentally verified pulse formation model for high-power femtosecond VECSELs

et al. 2013

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“…The CEO beat is thus either frequency-divided before being compared to a reference signal in a DBM, or a digital phase detector with a much larger linear phase response is used to measure the phase fluctuations of the CEO beat. For instance, in our comb CEO stabilization experiments [21,27,28,44], we typically used the digital phase detector DXD200 [45] that is also implemented in the frequency combs of the market leader MenloSystems (Martinsried/Munich, Germany) and provides a large linear phase response of ±64π.…”

Section: Ceo Stabilization Loopmentioning

confidence: 99%

“…When a tight lock cannot be achieved, the stabilized signal keeps a finite linewidth and one generally refers to this situation as a loose lock (Figure 5a). [27,28]. The upper graphs show the RF spectrum with the presence of a coherent carrier in the case of the tight lock.…”

Section: Ceo Stabilization Loopmentioning

confidence: 99%

“…The pump current has a direct influence on the pulse parameters of the femtosecond laser, such as pulse duration and energy, which directly translates into a change of fCEO. CEO stabilization by pump current modulation has thus been implemented in various DPSSLs that will be described in more details in Sections (3) and (4) [21,[25][26][27][28][29][30][31]. However, the pump current acts onto fCEO through the gain medium, and the corresponding modulation bandwidth is limited by the upper-state lifetime of the gain material that induces a roll-off in the modulation response of fCEO.…”

Section: Ceo Stabilization Loopmentioning

confidence: 99%

“…This is the most common method to CEO-stabilize fiber laser frequency combs using the self-referencing f-to-2f interferometry method [24]. This method is applicable in a similar way in DPSSLs and constitutes the most common means to CEO-stabilize this type of femtosecond lasers [21,[25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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

Schilt

Südmeyer

2015

Applied Sciences

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Optical frequency combs have been revolutionizing many research areas and are finding a growing number of real-world applications. While initially dominated by Ti:Sapphire and fiber lasers, optical frequency combs from modelocked diode-pumped solid-state lasers (DPSSLs) have become an attractive alternative with state-of-the-art performance. In this article, we review the main achievements in ultrafast DPSSLs for frequency combs. We present the current status of carrier-envelope offset (CEO) frequency-stabilized DPSSLs based on various approaches and operating in different wavelength regimes. Feedback to the pump current provides a reliable scheme for frequency comb CEO stabilization, but also other methods with faster feedback not limited by the lifetime of the gain material have been applied. Pumping DPSSLs with high power multi-transverse-mode diodes enabled a new class of high power oscillators and gigahertz repetition rate lasers, which were initially not believed to be suitable for CEO stabilization due to the pump noise. However, this challenge has been overcome, and recently both high power and gigahertz DPSSL combs have been demonstrated. Thin disk lasers have demonstrated the highest pulse energy and average power emitted from any ultrafast oscillator and present a high potential for the future generation of stabilized frequency combs with hundreds of watts average output power.

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Offset-Free Gigahertz Midinfrared Frequency Comb Based on Optical Parametric Amplification in a Periodically Poled Lithium Niobate Waveguide

et al. 2016

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We report the generation of an optical frequency comb in the mid-infrared with 1-GHz comb line spacing and no offset with respect to absolute zero frequency. This comb is tunable from 2.5-4.2 µm and covers a critical spectral region for important environmental and industrial applications such as molecular spectroscopy of trace gases. We obtain such a comb by highly efficient frequency conversion of a near-infrared frequency comb based on a compact diode-pumped SESAM-modelocked Yb:CALGO laser operating at 1 µm. The frequency conversion process is based on optical parametric amplification (OPA) in a periodically-poled lithium niobate (PPLN) chip containing buried waveguides fabricated by reverse proton exchange (RPE). The laser with a repetition rate of 1 GHz is the only active element of the system. It provides the pump pulses for the OPA process as well as seed photons in the range of 1.4-1.8 µm via supercontinuum generation (SCG) in a silicon nitride (Si3N4) waveguide. Both the PPLN and Si3N4 waveguides represent particularly suitable platforms for low-energy nonlinear interactions; they allow for mid-IR comb powers per comb line at the microwatt-level and signal amplification levels up to 35 dB with 2 orders of magnitude less pulse energy than reported in OPA systems using bulk devices. Based on numerical simulations, we explain how high amplification can be achieved at low energy using the interplay between mode confinement and a favorable group velocity mismatch configuration where the mid-IR pulse moves at the same velocity as the pump.

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Noise properties of an optical frequency comb from a SESAM-mode-locked 1.5-μm solid-state laser stabilized to the 10−13 level

Abstract: This page was generated automatically upon download from the ETH Zurich Research Collection. For more information, please consult the Terms of use.

Cited by 14 publications

References 69 publications

Experimentally verified pulse formation model for high-power femtosecond VECSELs

Experimentally verified pulse formation model for high-power femtosecond VECSELs

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

Offset-Free Gigahertz Midinfrared Frequency Comb Based on Optical Parametric Amplification in a Periodically Poled Lithium Niobate Waveguide

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