Picosecond optical sampling

Haus, H.A.; Kirsch, Steven T.; Mathyssek, K.; Leonberger, F. J.

doi:10.1109/jqe.1980.1070584

Cited by 40 publications

(2 citation statements)

References 20 publications

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“…One taken has been the mode locking of the semiconductors laser [4]. Another was the work on samplers, multiplexers and demultiplexers [5]. Also at that time there was a growing interest in the use of nonlinear properties of semiconductors for the design of optical elements to process optical pulses.…”

Section: Logic Gate By Laser Diode Bistabilitymentioning

confidence: 99%

Boolean logic device done with DFB laser diode

2004

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We present simulation results on how power output-input characteristic Instability in Distributed FeedBack -DFB semiconductor laser diode SLA can be employed to implemented Boolean logic device. Two configurations of DFB Laser diode under external optical injection, either in the transmission or in the reflective mode of operation, is used to implement different Optical Logic Cells (OLCs), called the Q-and the P-Device OLCs. The external optical injection correspond to two inputs data plus a cw control signal that allows to choose the Boolean logic function to be implement. DFB laser diode parameters are choosing to obtain an output-input characteristic with the values desired. The desired values are mainly the on-off contrast and switching power, conforming shape of hysteretic cycle. Two DFB lasers in cascade, one working in transmission operation and the other one in reflective operation, allows designing an inputoutput characteristic based on the same respond of a self-electrooptic effect device is obtained. Input power for a bit'T' is 35 uW(70uW) and a bit "0" is zero for all the Boolean function to be execute. Device control signal range to choose the logic function is 0-140 uW (280 uW). Q-device (P-device) Keywords: semiconductor laser, DFB laser diode, optical logic device, optical computing INTRODUCCIÓNLogic functions have been the cornerstone of a large number of systems and architectures, both in optical computing and in photonic switching. In most of the cases, these functions have been obtained either from specific devices with bistable characteristics or from hybrid configurations emulating this behaviour. Self-Electro optic Effect Devices (SEED) and etalon-like configurations have been extensively employed. Their main advantages are the possibility to obtain very fast switching times and their change in optical properties according to the employed wavelength. But these devices are sometimes difficult to find and their characteristics may greatly differ from one particular type to another. It is because that in this paper we present the possibility to obtain similar behaviour as the above mentioned specific devices, SEED or "on-off, with other devices commonly used in optical communications, namely, laser diodes. This line has been reported some years ago but the present intention is to present the real behaviour of these structures when a non-linear characteristic is need. The main objective of this paper is analyze the nonlinear properties of DFB laser amplifier and the way it can work as an elemental building block to construct Boolean Logic Functions as the authors of this paper have reported previously with conventional bistable devices. We have been working on the design of optical structures to be applied as Boolean logic function for optical computing and optical switching and routing for optical communications. Our previous work was based on the definition of this logic structure using the methodology of simulation by functional model, and experimentally has been done with an optoel...

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Section: Logic Gate By Laser Diode Bistabilitymentioning

confidence: 99%

Boolean logic device done with DFB laser diode

2004

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“…Third, there is optical pulse gating which falls into two categories: optically driven [50] and electrically driven [51], [52]. Such methods will lead to improved and versatile optical pulse measurement systems.…”

Section: Remarks and Future Directionsmentioning

confidence: 99%

Picosecond-Domain Waveform Measurement: Status and Future Directions

Nahman

1983

IEEE Trans. Instrum. Meas.

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A review of the state of the art of picosecond timedomain waveform measurements is presented which includes measurements in both the electrical and optical regions of the electromagnetic spectrum. This review is the latest edition of a series of reviews on high-speed pulse measurements compiled by the author commencing in 1967 [1]; specifically this review updates the 1978 review, [2]. The significance of the IEEE Pulse Standards 181 and 194 (or the identical IEC Standards 469-1 and 469-2) are discussed briefly. The classification of time-domain measurements from the 1978 review is summarized and augmented with basic instrumentation block diagrams. The advances in the present-day capabilities from those in 1978 are presented via temporal resolution state-of-the-art charts using the 1978 format; however, the only entries in the charts are those that have changed since 1978. Also, presented are some opinions as to the future directions of electrical and optical picosecond domain measurements. Fifty-six references are cited.

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Generation of ultrafast laser pulses by electrooptic modulation

Kobayashi

1992

Electron Comm Jpn Pt II

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The passive mode locking traditionally used frequently for generation of ultrafast optical pulses has a problem in generality and controllability although the method can generate short pulses. On the other hand, it is considered that the method based on electrooptic modulation cannot reduce the pulsewidth and the speed is slow even though the controllability is superior. This paper describes the research on the forced mode‐locking method for possible ultrashort and ultrafast properties and the external direct modulation pulse generation method, even though the highly controllable electrooptic modulation is used. First, the forced mode‐locking method is described in which the locking modulator (mode locker) with a pulse‐like transparency in itself and a deflector and a composite resonator are used. Next, a method is described in which short pulses on the order of subpicoseconds can be generated regardless of the laser bandwidth by means of the pulse‐generating modulator outside the laser cavity. (An example is a modified Fabry‐Perot modulator.) Further, an optical pulse synthesizer with a possibility of generating subpico‐second to several tens of femtosecond pulses is described in which the narrowband large signal electrooptic modulator and a deflector are used for generating optical sidebands with a wide optical bandwidth and they are combined for generation of arbitrary‐shaped optical pulse after the phase and amplitude are controlled. The concept is compared with the experiments. Some methods are still under development.

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Picosecond optical sampling

Cited by 40 publications

References 20 publications

Boolean logic device done with DFB laser diode

Boolean logic device done with DFB laser diode

Picosecond-Domain Waveform Measurement: Status and Future Directions

Generation of ultrafast laser pulses by electrooptic modulation

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