Journal ArticleDOI
100-Mbit/s semiduplex optical fiber transmission experiment using GaAs/GaAlAs laser transceivers
Arne Alping,R. Tell +1 more
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TLDR
In this article, a single-mode optical fiber was used for high-data-rate transmission over a single optical fiber using GaAs/GaAlAs channeled substrate planar (CSP) structure laser both as light source and photodetector, which is suitable for semiduplex transmission since the emissive spot and the photosensitive area of the laser coincide.Abstract:
Semiduplex, high-data-rate transmission over a single optical fiber using GaAs/GaAlAs channeled substrate planar (CSP) structure lasers both as light source and photodetector has been demonstrated. The responsivity in the receiving mode at the operating wavelength (830 nm) was 0.15 A/W. This device is suitable for semiduplex transmission, since the emissive spot and the photosensitive area of the laser coincide. The impulse response was measured to be 2.5 ns full width at half maximum (FWHM) at zero bias voltage. A 500-m single-mode fiber was used, and by using microlenses the input coupling loss was reduced to less than 4.5 dB. Measurements at a data rate of 100 Mbit/s return to zero (RZ) shows an optical power margin of 14 dB for a bit error rate (BER) of 10-9. Using lasers instead of LED's as transceivers would improve the transmission capability and the system margin of a semiduplex communication link.read more
Citations
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Journal ArticleDOI
Photodetection properties of semiconductor laser diode detectors
Arne Alping,R. Tell,S. Eng +2 more
TL;DR: In this paper, several commercial GaAlAs and InGaAsP injection lasers have been investigated with respect to their photodetection properties and the responsivity of the laser diode detectors is in the 0.15-0.25 A/W range and the dark current ranges from 5 nA to 500 nA at 3V reverse bias.
Journal ArticleDOI
Characteristics of 1.3- mu m InGaAsP lasers used as photodetectors
TL;DR: In this article, the photodetection capabilities of 1.3-mu m channel substrate laser diodes are studied. But the spectral bandwidth extends from 1.1 to 1.37 mu m and the dark current at room temperature is 200 nA at 1-V bias.
Journal ArticleDOI
Time compression multiplex transmission system using a 1.3 mu m semiconductor laser as a transmitter and a receiver
TL;DR: A bidirectional system using 1.3 mu m lasers as a transmitter and a receiver and the polarization dependence of sensitivity originates from the TE and TM modes dependence of both mode confinement factor and reflection at a facet is investigated.
Journal ArticleDOI
A 3-D bidirectional optical link using a stacked thin-film emitter and detector
TL;DR: In this paper, the fabrication of a colocated three-dimensional stacked thin-film device, which can be used for single-fiber bidirectional communication, has been demonstrated.
Journal ArticleDOI
A compact optical isolator with a plano-convex YIG lens for laser-to-fiber coupling
TL;DR: In this article, an optical isolator for laser-to-single-mode fiber coupling is proposed, which consists of a confocal two-lens system with a spherical glass lens and a planoconvex lens made of yttrium iron garnet (YIG).
References
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Journal ArticleDOI
Receiver design for digital fiber optic communication systems, II
TL;DR: In this article, it is shown that a proper front-end design incorporates a high-impedance preamplifier which tends to integrate the detector output, and this must be followed by proper equalization in the later stages of the linear channel.
Journal ArticleDOI
Material dispersion in lightguide glasses
TL;DR: In this paper, material dispersion measurements on six characteristic lightguide glass compositions are reported on bulk specimens and cover the wavelength range from 0.8 to 1.5 μm.
Journal ArticleDOI
Measurement of gain and absorption spectra in AlGaAs buried heterostructure lasers
TL;DR: In this article, a new method for measuring absorption and gain spectra of lasers is presented, which is based on the application of general relations between the rates of spontaneous emission, stimulated emission, and optical absorption.
Journal ArticleDOI
Microlenses for coupling junction lasers to optical fibers.
TL;DR: A novel photolithographic technique was used to make hemispherical and hemicylindrical microlenses, with diameters between 4 microm and 10 microm, from commercially available negative type photoresist that is transparent at ir laser wavelengths.
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