Journal ArticleDOI
Stabilized biasing of semiconductor lasers
R.G. Swartz,Bruce A. Wooley +1 more
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TLDR
Results of the study indicate that to eliminate from the optical output any dependence on either variation in laser device characteristics or the dc average of the input signal, feedback control of both the prebias and modulation current is necessary.Abstract:
In this paper we analyze the design of biasing and control circuits for semiconductor lasers in a generalized context based on an idealized laser characteristic. In particular, we address three major design considerations: whether to bias the laser above or below threshold, how to stabilize the optical output levels independent of variation in the average output power, and to what degree the output levels can be stabilized relative to various circuit and device parameters. Results of our study indicate that to eliminate from the optical output any dependence on either variation in laser device characteristics or the dc average of the input signal, feedback control of both the prebias and modulation current is necessary.read more
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References
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Journal ArticleDOI
Atlanta fiber system experiment: GaAIAs laser transmitter for lightwave transmission systems
TL;DR: In this paper, a feedback-stabilized GaAlAs injection laser optical-communication source for transmission of NRZ data at 44.736 Mb/s has been built and tested.
Journal ArticleDOI
A Field Trial of Fiber Optic Subscriber Loop Systems Utilizing Wavelength-Division Multiplexers
TL;DR: This paper first describes fiber optic transmission technologies for subscriber loops, then, the system configuration and experimental results of the Yokosuka field trial are presented.
Journal ArticleDOI
Electronic Circuits for High Bit Rate Digital Fiber Optic Communication Systems
TL;DR: Electronic components for digital fiber optic transmitters and receivers with bit rates from several hundred Mbits/s up into the Gbits/S range are described and drivers and multiplexers suitable for direct laser modulation were developed for use in the transmitter units.
Journal ArticleDOI
Simultaneous feedback control of bias and modulation currents for injection lasers
TL;DR: In this paper, a feedback circuit is described which regulates the light output from an injection laser through simultaneous independent control of bias current and modulation current, which is capable of preserving a large extinction ratio and it is independent of the duty cycle of the modulating signal.
Journal ArticleDOI
An integrated circuit for multiplexing and driving injection lasers
TL;DR: In this article, a monolithic silicon integrated circuit was designed to provide feedback-stabilized biasing and high-speed modulation for semiconductor injection lasers, which is capable of selecting and controlling any one of a group of four lasers, and in the event of laser darkening it automatically switches to a replacement laser.