Spectral control of asymmetric‐waveguide large signal modulated diode lasers for non‐linear applications

Avrutin, E.A.; Dogru, Nuran; Ryvkin, B. S.; Kostamovaara, J.

doi:10.1049/iet-opt.2015.0060

Cited by 5 publications

(2 citation statements)

References 20 publications

(49 reference statements)

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“…Most of the simulations were performed with the in-house Travelling Wave model LasTiDom, as described in previous papers (see e.g. [25]), though we note that for most cases (except the longest absorber lengths and very large unsaturated absorption) most of the results (except the lasing spectra) were reproduced fairly well by simple rate equation simulations.…”

Section: Calculationsmentioning

confidence: 98%

Laser diode structures with a saturable absorber for high-energy picosecond optical pulse generation by combined gain-and Q-switching

Ryvkin

Avrutin

Kostamovaara

et al. 2017

Semicond. Sci. Technol.

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The performance of gain-switched Fabry-Perot asymmetric-waveguide semiconductor lasers with a large equivalent spot size and an intracavity saturable absorber was investigated experimentally and theoretically. The laser with a short (~ 20 m) absorber emitted highenergy afterpulse-free optical pulses in a broad range of injection current pulse amplitudes; optical pulses with a peak power of about 35 W and a duration of about 80 ps at half maximum were achieved with a current pulse with an amplitude of just 8 A and a duration of 1.5 ns. Good quality pulsations were observed in a broad range of elevated temperatures. The introduction of a substantially longer absorber section lead to strong spectral broadening of the output without a significant improvement to pulse energy and peak power. Introduction: Picosecond-range (~100 ps) high energy optical pulse generation with semiconductor lasers has attracted significant attention recently, with a view for obtaining compact optical sources for applications such as high-precision laser radars (the most immediate intended application in our studies) three-dimensional (3-D) time imaging, spectroscopy and lifetime studies. Pulses of such duration, or shorter, have been reported by a large number of authors since the early days of laser diode technology (see e.g. [1,2] for an overview). The main techniques used are gain switching (pumping the laser with a current pulse of a nanosecond duration or somewhat shorter, but still significantly longer than the desired optical pulse), active or passive Q-switching (using a laser incorporating an active voltage-controlled modulator or a saturable absorber respectively), or a combination of these techniques. The general principles of all these regimes have been relatively well understood

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Section: Calculationsmentioning

confidence: 98%

Laser diode structures with a saturable absorber for high-energy picosecond optical pulse generation by combined gain-and Q-switching

Ryvkin

Avrutin

Kostamovaara

et al. 2017

Semicond. Sci. Technol.

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“…We use the travelling-wave laser model LasTiDom (see [10][11][12] for the model description), applied previously to a number of laser designs including mode-locked lasers and self-seeded gain-switched external cavity laser diodes. The construction used is schematically shown in Figure 1 and consists of an active semiconductor chip with the outer facet reflecting and the inner facet (facing a passive cavity) with zero reflectance, a passive resonator, and a tunable reflector simulating the filter.…”

Section: The Model and The Single Contact Structure Studiedmentioning

confidence: 99%

Dynamics of single- and multicontact external cavity semiconductor lasers under intracavity frequency sweeping: effects of material and laser parameters

Avrutin

Zhang

2019

Eur. Phys. J. B

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We present numerical analysis of the dynamic behavior of a single-and multicontact Fabry-Perot semiconductor laser frequency-swept by means of an ultrafast intracavity filter. The interrelated roles of the tuning speed, the filter bandwidth, the cavity length, and the self-phase modulation in laser dynamics are analyzed. Regular and irregular mode hopping, as well as fundamental and second harmonic sliding frequency mode locking and chaotic laser operation are identified as important dynamic regimes. The relation between the tuning dynamics asymmetry and the self-phase modulation in the laser is studied. The operation of a multicontact laser with an intracavity saturable absorber in a combined sliding-frequency and passive mode locking regime is shown; the dynamic asymmetry in the laser behavior is shown to be reduced but not eliminated by the presence of the absorber.

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Gain-switched short pulse generation from InAs-InP (1 1 3)B quantum dot laser excited state

Dogru

Tunc

Al-Dabbagh

2022

Optics & Laser Technology

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Spectral control of asymmetric‐waveguide large signal modulated diode lasers for non‐linear applications

Cited by 5 publications

References 20 publications

Laser diode structures with a saturable absorber for high-energy picosecond optical pulse generation by combined gain-and Q-switching

Laser diode structures with a saturable absorber for high-energy picosecond optical pulse generation by combined gain-and Q-switching

Dynamics of single- and multicontact external cavity semiconductor lasers under intracavity frequency sweeping: effects of material and laser parameters

Gain-switched short pulse generation from InAs-InP (1 1 3)B quantum dot laser excited state

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