High-speed asynchronous optical sampling based on GHz Yb:KYW oscillators

Li, Changxiu; Krauß, Nico; Schäfer, Gerhard; Ebner, Lukas; Kliebisch, Oliver; Schmidt, Jan; Winnerl, S.; Hettich, Mike; Dekorsy, Thomas

doi:10.1364/oe.25.009204

Cited by 15 publications

(12 citation statements)

References 41 publications

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“…A more detailed description of the experimental set-up can be found in Ref. [25]. Tables 1 and 2 list relevant properties of the lasers and the sample, respectively.…”

Section: Methodsmentioning

confidence: 99%

Broadband Photo-Excited Coherent Acoustic Frequency Combs and Mini-Brillouin-Zone Modes in a MQW-SESAM Structure

Gusev

Dimakis

et al. 2019

Applied Sciences

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A multiple quantum-well semiconductor saturable absorber mirror (MQW-SESAM) structure has been investigated by femtosecond pump-probe laser spectroscopy at a central wavelength of around 1050 nm. Coherent acoustic phonons are generated and detected over a wide frequency range from ~15 GHz to ~800 GHz. In the optical absorption region, i.e., in the multiple quantum wells (In0.27Ga0.73As), acoustic frequency combs centered at ~365 GHz, with a comb spacing of ~33 GHz, are generated. Most importantly, in the transparent region, i.e., in the distributed Bragg reflector, which is formed by a non-doped long-period semiconductor GaAs/Al0.95Ga0.05As superlattice, the mini-Brillouin-zone center, as well as zone-edge acoustic modes, are observed. The mini-zone-center modes with a fundamental frequency of 32 GHz can be attributed to the spatial modulation of the pump optical interference field with a period very close to that of the distributed Bragg reflector, in combination with the periodic spatial modulation of the electrostriction coefficient in the distributed Bragg reflector. The excitation of mini-zone-edge modes is attributed to the stimulated subharmonic decay of the fundamental center modes. Their subsequent back-folding to the mini-Brillouin-zone center makes them Raman active for the probe light.

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“…A more detailed description of the experimental set-up can be found in Ref. [25]. Tables 1 and 2 list relevant properties of the lasers and the sample, respectively.…”

Section: Methodsmentioning

confidence: 99%

Broadband Photo-Excited Coherent Acoustic Frequency Combs and Mini-Brillouin-Zone Modes in a MQW-SESAM Structure

Gusev

Dimakis

et al. 2019

Applied Sciences

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“…As we will show in the following this does not hinder an already in depth understanding of the undergoing acoustic dynamics. Based on the structure of the triple-QW stack where the thickness of InGaAs is very close to that of the GaAs barrier d InGaAs ≈d barrier , and the wave-packet-like acoustic oscillations displayed in our earlier measurements [39,40], it is reasonable to assume that the stress wave generated in each triple-QW stack is a cosine wave enveloped by the profile of the stack. For simplicity, we will initially assume that the stack generation profile exhibits a Gaussian shape.…”

Section: Theoretical Modellingmentioning

confidence: 95%

“…The two lasers are working at a pulse repetition rate level of 1 GHz, with a small repetition rate difference of 5 kHz stabilized by a phase-locked loop (f pump = 1 GHz + 5 kHz, f probe = 1 GHz), emitting at a central wavelength of ~1050 nm. The detailed set-up description can be found in our previous report [39]. The system performance is characterized in terms of temporal resolution and detection sensitivity.…”

Section: Experimental Set-up and Samplementioning

confidence: 99%

“…Previously we have described and discussed CAPs excited in the same MQW structure by a single-pump-pulse ASOPS system based on two Yb:KYW lasers, where an acoustic wavepacket temporal sequence was produced, due to spatially periodically distributed triple-QW stacks [39,40]. Aiming to optically coherently controlling the CAPs in this structure, a second pump pulse with tunable time delay ∆T and tunable pump power P 2 is introduced in the experimental set-up.…”

Section: Tunable Pump Delay Fixed Pump Powermentioning

confidence: 99%

“…The high detection sensitivity of our ASOPS system enables to follow already small changes in the controlled acoustic dynamics at a very low incident power of the second pump light. Previously we had reported only on CAPs excited in the same sample in a single-pump-pulse configuration [39,40], which only presented elementary interpretations of CAPs generation, propagation and detection in the MQWs and established a basic understanding of the relevant dynamics. In order to elucidate the acoustic modulation taking place in the double-pump-pulse process, we develop a simplified theoretical model, which is initially applied to the analysis of the single-pumppulse system, and is subsequently advanced to cope with the more complicated double-pumppulse situation, and is finally optimized by two approaches.…”

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confidence: 99%

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All optical control of comb-like coherent acoustic phonons in multiple quantum well structures through double-pump-pulse pump-probe experiments

Li¹,

Gusev²,

Dekorsy³

et al. 2019

Opt. Express

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We present an advancement in applications of ultrafast optics in picosecond laser ultrasonics -laser-induced comb-like coherent acoustic phonons are optically controlled in a In 0.27 Ga 0.73 As/GaAs multiple quantum well (MQW) structure by a high-speed asynchronous optical sampling (ASOPS) system based on two GHz Yb:KYW lasers. Two successive pulses from the same pump laser are used to excite the MQW structure. The second pump light pulse has a tunable time delay with respect to the first one and can be also tuned in intensity, which enables the amplitude and phase modulation of acoustic phonons. This yields rich temporal acoustic patterns with suppressed or enhanced amplitudes, various wave-packet shapes, varied wave-packet widths, reduced wave-packet periods and varied phase shifts of singleperiod oscillations within a wave-packet. In the frequency domain, the amplitude and phase shift of the individual comb component present a second-pump-delay-dependent cosinewave-like and sawtooth-wave-like variation, respectively, with a modulation frequency equal to the comb component frequency itself. The variations of the individual component amplitude and phase shift by tuning the second pump intensity exhibit an amplitude valley and an abrupt phase jump at the ratio around 1:1 of the two pump pulse intensities for certain time delays. A simplified model, where both generation and detection functions are assumed as a cosine stress wave enveloped by Gaussian or rectangular shapes in an infinite periodic MQW structure, is developed in order to interpret acoustic manipulation in the MQW sample. The modelling agrees well with the experiment in a wide range of time delays and intensity ratios. Moreover, by applying a heuristic-analytical approach and nonlinear corrections, the improved calculations reach an excellent agreement with experimental results and thus enable to predict and synthesize coherent acoustic wave patterns in MQW structures.

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2.6-GHz fundamental repetition rate, Q-switched mode-locking Nd3+-doped single-mode silica fiber laser, fabricated by zeolite method

Yamasaki

Kagebayashi

Hiraishi

et al. 2021

Optics Communications

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High-speed asynchronous optical sampling based on GHz Yb:KYW oscillators

Cited by 15 publications

References 41 publications

Broadband Photo-Excited Coherent Acoustic Frequency Combs and Mini-Brillouin-Zone Modes in a MQW-SESAM Structure

Broadband Photo-Excited Coherent Acoustic Frequency Combs and Mini-Brillouin-Zone Modes in a MQW-SESAM Structure

All optical control of comb-like coherent acoustic phonons in multiple quantum well structures through double-pump-pulse pump-probe experiments

2.6-GHz fundamental repetition rate, Q-switched mode-locking Nd3+-doped single-mode silica fiber laser, fabricated by zeolite method

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