20 nm wavelengty tunable singlemode picosecond pulse generation at 1.3 μm by self-seeded gain-switched semiconductor laser

Schell, Martin; Huhse, D.; Weber, A.; Fischbeck, G.; Bimberg, D.; Tarasov, D. S.; Gorbachov, A.V.; Garbuzov, D.Z.

doi:10.1049/el:19921383

Cited by 54 publications

(19 citation statements)

References 4 publications

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“…We varied the external cavity length between 235mm and 250mm, corresponding to a maximum of 50ps time offset between the feedback signal and the main laser signal. This variation did not induce any noticeable changes in the temporal and spectral characteristics of the laser output, and the system showed stability similar to that reported for the near-IR systems [3][4][5] .…”

Section: Methodssupporting

confidence: 55%

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Self-seeded gain-switched operation of an InGaN MQW laser diode

Dubov

Khrushchev

2004

SPIE Proceedings

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Self-seeded, gain-switched operation of an InGaN multi-quantum-well laser diode has been demonstrated for the first time. An external cavity comprising Littrow geometry was implemented for spectral control of pulsed operation. The feedback was optimized by adjusting the external cavity length and the driving frequency of the laser. The generated pulses had a peak power in excess of 400mW, a pulse duration of 60ps, a spectral linewidth of 0.14nm and maximum side band suppression ratio of 20dB. It was tunable within the range of 3.6nm centered at a wavelength of 403nm.

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Section: Methodssupporting

confidence: 55%

“…Here, we present an alternative method, based on gain-switched operation of a commercial, unmodified InGaN laser, self-seeded in a non-resonant external cavity, thus implementing a technique previously demonstrated in the near infrared (IR) spectral region [3][4][5] .…”

Section: Introductionmentioning

confidence: 99%

Self-seeded gain-switched operation of an InGaN MQW laser diode

Dubov

Khrushchev

2004

SPIE Proceedings

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“…Gain switching of the LD provides an easy and convenient way for optical short-pulse generation by directly driving the LD with ultrashort pulses [1] or sinusoidal electrical currents [2,3]. Moreover, to generate tunable singlewavelength optical short pulses by gain-switching, an injection locking scheme is usually employed, which can be achieved externally by the injection of a cw light beam [4], the optical pulses generated in another LD [5,6], or internally by the feedback optical pulses, i.e., self-seeding [7][8][9]. Self-seeding is a relatively simple method, as only one commercially available LD is used.…”

Section: Introductionmentioning

confidence: 99%

Wavelength-tunable optical short pulses with high sidemode suppression ratio generated by use of Bi-EDFA

Xia

Wang

2008

J. Opt. Soc. Am. B

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A bidirectional erbium-doped fiber amplifier (Bi-EDFA) has been used in a self-seeding scheme for wavelengthtunable optical short pulse generation. The pulse wavelength is selected and purified by use of two tunable Fabry-Perot (FP) optical filters with bandwidth of 0.11 nm and 99 pm respectively, while a constant repetition frequency of 1.045 GHz is maintained. The sidemode suppression ratio (SMSR) of the output pulses achieved is better than 40 dB over the wavelength tuning range of 33 nm. The system is simple and efficient, and a continuous wavelength tuning can be readily achieved.

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“…[1][2][3][4] However, the intensity of light injected into the laser diode is usually small, which leads to a relatively low side-mode suppression ratio (SMSR) of the output pulses. 5,6 Another problem of weak intensity light injection is the limited injectionlocking range; i.e., injection locking can happen only within a small range centered on each laser's longitudinal mode, 7,8 with the results that wavelength tuning of a FP laser diode can be implemented only in a discrete manner and that the smallest wavelength-tuning step depends on the mode spacing of the laser diode used. As the laser emission mode wavelengths may not coincide with the International Telecommunication Union grid wavelengths, the applications of FP laser diodes in optical fiber communications may be limited.…”

Section: Introductionmentioning

confidence: 99%