Picosecond optical pulse generation from an r.f. modulated AlGaAs d.h. diode laser

Ito, Hiromasa; Yokoyama, Hiroyuki; Murata, Shigeru; Inaba, Humio

doi:10.1049/el:19790528

Cited by 75 publications

(14 citation statements)

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“…The optical pumping is important to investigate the fundamental short-pulse limit in each device independently of the electrical frequency bandwidth limit on the current injection. Figure 1b shows the shortest pulses of the gain-switched semiconductor lasers achieved in the past 40 years both via electrical and optical pumping [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] . Even with optical pumping, short-pulse generation has been restricted to picoseconds.…”

Section: Resultsmentioning

confidence: 99%

Femtosecond pulse generation beyond photon lifetime limit in gain-switched semiconductor lasers

et al. 2018

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Femtosecond semiconductor lasers are ideal devices to provide the ultrashort pulses for industrial and biomedical use because of their robustness, stability, compactness and potential low cost. In particular, gain-switched semiconductor lasers have significant advantages of flexible pulse shaping and repetition rate with the robustness. Here we first demonstrate our laser, which is initiated by very strong pumping of 100 times the lasing threshold density, can surpass the photon lifetime limit that has restricted the pulse width to picoseconds for the past four decades and produce an unprecedented ultrashort pulse of 670 fs with a peak power of 7.5 W on autocorrelation measurement. The measured phenomena are reproduced effectively by our numerical calculation based on rate equations including the non-equilibrium intraband carrier distribution, which reveal that the pulse width is limited by the carrier-carrier scattering time, instead of the photon lifetime.

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Section: Resultsmentioning

confidence: 99%

Femtosecond pulse generation beyond photon lifetime limit in gain-switched semiconductor lasers

et al. 2018

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“…In Q-switching lasers, in contrast to mode-locked lasers, no external mirror is needed [80], [81] and lower modulation power is required compared to gain switching systems [82], [83]. Recently, effective active Q switching was successfully demonstrated by Arakawa et al [13] in a GaAsIAlGaAs MQW laser with an intracavity monolithic electroabsorption loss modulator.…”

Section: B Q Switching In An Mqw Laser With An Internal Loss Modulationmentioning

confidence: 99%

Quantum well lasers--Gain, spectra, dynamics

Arakawa

Yariv

1986

IEEE J. Quantum Electron.

562

154

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“…One very convenient method to generate ultrashort pulses from semiconductor lasers involves the direct high-frequency modulation of the laser driving current in a process known as gain-switching [25]. This is particularly attractive since the repetition rate of the pulse train can be continuously varied by simply adjusting the gain-switching frequency.…”

Section: Bsingle-mode Gain-switched Ingaasp Fabry-perot Laser Diodementioning

confidence: 99%

Complete characterization of ultrashort pulse sources at 1550 nm

Dudley

Barry

Harvey

et al. 1999

IEEE J. Quantum Electron.

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Abstract-This paper reviews the use of frequency-resolved optical gating (FROG) to characterize mode-locked lasers producing ultrashort pulses suitable for high-capacity optical communications systems at wavelengths around 1550 nm. Secondharmonic generation (SHG) FROG is used to characterize pulses from a passively mode-locked erbium-doped fiber laser, and both single-mode and dual-mode gain-switched semiconductor lasers. The compression of gain-switched pulses in dispersion compensating fiber is also studied using SHG-FROG, allowing optimal compression conditions to be determined without a priori assumptions about pulse characteristics. We also describe a fiberbased FROG geometry exploiting cross-phase modulation and show that it is ideally suited to pulse characterization at optical communications wavelengths. This technique has been used to characterize picosecond pulses with energy as low as 24 pJ, giving results in excellent agreement with SHG-FROG characterization, and without any temporal ambiguity in the retrieved pulse.

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Picosecond optical pulse generation from an r.f. modulated AlGaAs d.h. diode laser

Cited by 75 publications

References 1 publication

Femtosecond pulse generation beyond photon lifetime limit in gain-switched semiconductor lasers

Femtosecond pulse generation beyond photon lifetime limit in gain-switched semiconductor lasers

Quantum well lasers--Gain, spectra, dynamics

Complete characterization of ultrashort pulse sources at 1550 nm

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