10 GHz mode-locked ring laser with external optical modulation of a semiconductor optical amplifier

Papakyriakopoulos, T.; Avramopoulos, H.

doi:10.1109/ofc.1999.767775

Cited by 9 publications

(7 citation statements)

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“…We have recently presented a novel SOA-based ring laser where the SOA provides both gain and gain modulation in the optical cavity [20]. Gain modulation is obtained by injecting an external low-repetition-rate signal into the cavity.…”

Section: A High-speed Laser Sourcesmentioning

confidence: 99%

“…These subsystems span from simple optical power supply modules and Boolean logic circuits up to complex routing/switching systems. Within this context, serious effort 0733-8724/03$17.00 © 2003 IEEE has been invested during the past few years in the development of optical interferometric gates [6]- [12] with Boolean logic capability [13]- [19], short-pulse, high-repetition-rate laser sources [20]- [29], and clock-recovery circuits [31]- [38] for extracting the timing information required at each network node. Going one step further, optical shift registers [39]- [42] with read/write capability [41], [42], optical packet buffers [43], optical flip/flops [44], exchange-bypass switches [45], header separation and recognition techniques [46]- [51], as well as self-routing switches [52], [53] have been successfully demonstrated, and these are only a small part of the progress made up to now in the field.…”

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confidence: 99%

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Ultrafast time-domain technology and its application in all-optical signal processing

Vlachos¹,

Pleros

Bintjas

et al. 2003

J. Lightwave Technol.

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Abstract-In this paper, we review recent advances in ultrafast optical time-domain technology with emphasis on the use in optical packet switching. In this respect, several key building blocks, including high-rate laser sources applicable to any time-division-multiplexing (TDM) application, optical logic circuits for bitwise processing, and clock-recovery circuits for timing synchronization with both synchronous and asynchronous data traffic, are described in detail. The circuits take advantage of the ultrafast nonlinear transfer function of semiconductor-based devices to operate successfully at rates beyond 10 Gb/s. We also demonstrate two more complex circuits-a header extraction unit and an exchange-bypass switch-operating at 10 Gb/s. These two units are key blocks for any general-purpose packet routing/switching application. Finally, we discuss the system perspective of all these modules and propose their possible incorporation in a packet switch architecture to provide low-level but high-speed functionalities. The goal is to perform as many operations as possible in the optical domain to increase node throughput and to alleviate the network from unwanted and expensive optical-electrical-optical conversions.Index Terms-Exchange-bypass switch, interferometric gates, optical switching, optical time-division multiplexing (OTDM), packet switching, optical signal processing, semiconductor optical amplifier (SOA).

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Section: A High-speed Laser Sourcesmentioning

confidence: 99%

mentioning

confidence: 99%

Ultrafast time-domain technology and its application in all-optical signal processing

Vlachos¹,

Pleros

Bintjas

et al. 2003

J. Lightwave Technol.

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“…In this approach, the SOA was operated in a high-gain condition and was gain depleted by a high-power mode-locked laser diode, resulting in complicated phase and amplitude modulation of the light circulated in the EDFL. Similar experiments were also implemented by gain depletion of the SOA by use of a gain-switched and pulse-compressed distributed-feedback laser diode (DFBLD) [8,9], generating a mode-locked pulse width of 4.3 ps in such a cross-gain-modulating configuration. The SOA acted as both the gain medium and the modulator in the techniques described above, whereas the mode locking was initiated after fast periodic gain depletion and relatively slow gain recovery in the SOA during strong pulse injection.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of optical backward-injection-induced gain-depletion modulation and mode locking in semiconductor optical amplifier fiber lasers

Lin¹,

Liao²,

Xia³

2004

Opt. Express

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The optical gain-depletion-induced mode-locking dynamics of a semiconductor optical-amplifier-based fiber ring laser (SOAFL) backward injected by a purely sinusoidally modulated or digitally encoded distributedfeedback laser diode are theoretically and experimentally demonstrated. The effect of gain depletion and waveform on the mode-locked pulse width, pulse shape, and power of the SOAFL are interpreted from theoretical simulations. The shortest pulse width of 12 ps can be generated from an optically sinusoidal-wave-modulated SOAFL. By backward injecting the SOAFL with a digitally encoded optical signal of adjustable duty cycle, one can observe the optimized gain depletion time of 400-600 ps required for mode locking the SOAFL.

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“…The laser platform uses a single active element, an SOA, to provide both gain and gain modulation in the fiber cavity via cross gain saturation from an external optical pulse train. This ring laser platform was first demonstrated at 10 GHz [30] and was extended to 40-GHz single-wavelength operation [31] and 30-GHz multiwavelength operation [32], exploiting further the nonlinear interaction of the optical pulses in the semiconductor. The use of a single SOA in the optical cavity in combination with the optical gain modulation yields significant performance advantages, as for example, the ultrafast modulation function, due to the fast carrier depletion of the SOA [31], the broad wavelength tunability [32]- [34], and the short picosecond pulse generation due to the nonlinear interaction of the optical signals in the SOA.…”

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confidence: 99%

Ultrafast Semiconductor-Based Fiber Laser Sources

Vlachos¹,

Bintjas

Pleros

et al. 2004

IEEE J. Select. Topics Quantum Electron.

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Abstract-In this paper, a novel ring laser platform is presented that uses a single active element, a semiconductor optical amplifier (SOA), to provide both gain and gain modulation in the optical cavity. Gain modulation is achieved by an externally introduced optical pulsed signal. This signal periodically saturates the amplifier gain and forces the ring laser to mode lock. Using this laser platform, we demonstrate picosecond pulsetrain generation at repetition rates up to 40 GHz, either in single or multiwavelength operation mode. In particular, using rational harmonic mode locking, 2.5-ps pulses were obtained up to a 40-GHz repetition rate, while output pulses and output power were constant over a 20-nm tuning range. In addition, a multiwavelength optical signal was obtained using the same laser platform with the addition of a Fabry-Pérot filter for comb generation. Multiwavelength oscillation is possible due to the broad gain spectrum of the SOA used and its inhomogeneous line broadening. To this end, 48 oscillating wavelengths were obtained at the laser output, with 50-GHz line spacing. Combining both modes of operation, it was possible to mode lock the oscillating multiwavelength signal and to obtain at the output ten wavelength channels, simultaneously mode locked at a 30-GHz repetition rate. The mode-locked channels are temporarily synchronized and exhibit almost identical spectral and time characteristics.

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10 GHz mode-locked ring laser with external optical modulation of a semiconductor optical amplifier

Cited by 9 publications

References 1 publication

Ultrafast time-domain technology and its application in all-optical signal processing

Ultrafast time-domain technology and its application in all-optical signal processing

Dynamics of optical backward-injection-induced gain-depletion modulation and mode locking in semiconductor optical amplifier fiber lasers

Ultrafast Semiconductor-Based Fiber Laser Sources

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