Journal ArticleDOI
Fabrication of a lithium tantalate temperature-stabilized optical modulator.
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TLDR
The LiTaO(3) optical modulator described damps out mechanical resonances caused by the piezoelectric properties of the crystals, and its thin-film substrate mounting is applicable to wideband modulation.Abstract:
LiTaO3 optical modulators have been developed using the technique of self-compensation for therma stability. By using two crystals in cascade, with optic axes 180° apart, and a half-wave plate between them with axis at 45°, the birefringence of each crystal is equal but opposite and there is no net change in birefringence with temperature. Aside from thermal stability, the optical modulator described damps out mechanical resonances caused by the piezoelectric properties of the crystals, and its thin-film substrate mounting is applicable to wideband modulation. Experimental measurements show that 95% modulation depth can be attained over a 25° C temperature range with virtually no change in the amplitude or phase of the modulated signal.read more
Citations
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Journal ArticleDOI
Time-resolved two-dimensional plasma spectroscopy using coherence-imaging techniques
TL;DR: In this paper, the authors describe methods for time-resolved imaging of the complex coherence of a spectral scene at one or more optical delays using electro-optically modulated polarization interferometers.
Journal ArticleDOI
Optical fiber sensors using the method of polarization-rotated reflection
TL;DR: In this article, the method of polarization-rotated reflection is applied to sensors with polarization-maintaining optical fibers, and stable measurement can be realized because the fluctuation of the light propagation characteristics in the fiber is canceled automatically without any additional active phase compensation techniques.
Journal ArticleDOI
Optical applications of ferroelectrics
TL;DR: Ferroelectric materials have found extensive application in optoelectronic devices for uses in optical communication, memory, display and coherent optical processing as discussed by the authors, including modulators, beam deflectors, light valves and holographic storage media.
Journal ArticleDOI
Long-term and wideband laser intensity stabilization with an electro-optic amplitude modulator
TL;DR: In this paper, the authors investigated an active control scheme using a single crystal to offset the drifts of different origins such as polarization, crystal birefringence, and electronics.
Journal ArticleDOI
Travelling wave electro-optic modulators
TL;DR: In this article, the performance of travelling wave electro-optic modulators is analyzed in both the time and frequency domains and it is shown that even at these high bandwidths it is not necessary to resort to velocity compensation of the electrical and light signals.
References
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Journal ArticleDOI
Dielectric materials for electrooptic, elastooptic, and ultrasonic device applications
TL;DR: In this paper, the authors describe some dielectric materials for low-loss optical transmission whose properties can be modified by an electric or magnetic field or applied external stress, and whose properties, at the same time, will interact in some specified manner with the optical beam.
Journal ArticleDOI
Lithium Tantalate Light Modulators
TL;DR: Light intensity modulators have been developed using single-domain lithium tantalate as the electro-optic material as discussed by the authors, and a broadband transistor amplifier which can develop 0.2 W output power drives the modulator sample which presents a capacitive load of 5 pF.
Journal ArticleDOI
Gigacycle-bandwidth coherent-light traveling-wave amplitude modulator
TL;DR: In this paper, an optical amplitude modulator with a bandwidth of approximately one Gc/s and requiring about a fifty-volt drive to produce a 100 per cent amplitude modulation was constructed by using the traveling-wave approach previously used in the gigacycle bandwidth phase modulator.
Journal ArticleDOI
A one-gigabit-per-second optical PCM communications system
TL;DR: In this article, an optical communications system is described which is capable of transmission and detection of 1-Gbċs-1pulse-code modulation (PCM) word patterns.
Journal ArticleDOI
Gigahertz optical modulation.
R. P. Riesz,M. R. Biazzo +1 more
TL;DR: Light pulses from a mode-locked He-Ne laser have been modulated by a LiTaO(3) electrooptic crystal mounted on a thin film substrate and amplitude modulation of 20% has been achieved at 2 GHz for a single pass through the modulator.
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