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An 800 MHz monolithic GaAs HBT serrodyne modulator
Proceedings of 1994 IEEE GaAs IC Symposium, 1995An 800 MHz monolithic mixed-signal serrodyne modulator IC has been developed in GaAs/AlGaAs HBT HI/sup 2/L process optimized for digital applications. This 3/spl times/2.8 mm, 2000+ transistor chip consists of a 7-bit phase accumulator driving a vector modulator, implemented as of a pair of balanced mixers, 5-bit switched-attenuators, buffer amplifiers,
L.J. Kushner +6 more
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Resonator fiber optic gyro using digital serrodyne modulation
Journal of Lightwave Technology, 1996A closed-loop operation of Resonator Fiber Optic Gyro, using digital serrodyne modulation for feedback to the input lightwave frequency, is proposed. Performances of this system under open-loop and closed-loop operation are experimentally demonstrated.
K. Hotate, M. Harumoto
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Serrodyne Frequency Translation Using Stepped Modulation Waveforms
IEEE Transactions on Aerospace and Electronic Systems, 1974This correspondence considers the use of a stepped phase shifter as an approximation to continuous phase shifting for serrodyne frequency translation. Variations in translation loss and suppression of undesirable components as a function of the number of steps used is presented.
M. Greenbaum, A. Kaufman, A. Wallen
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A wideband monolithic five-bit serrodyne modulator
11th Annual Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 2003An analysis and results of a serrodyne modulator, composed of a monolithic five-bit phase shifter and digital control circuits, are presented. Spur suppression of a serrodyne modulator is strongly dependent upon minimizing phase error and maintaining constant amplitude across all phase states.
S. Mitchell +4 more
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Theory And Experiment On Optical Phase Modulator For Serrodyne Modulation
SPIE Proceedings, 1988Theoretical and experimental performance of guided wave serrodyne phase modulators formed through indiffusion of Ti into LiNb03 substrates is discussed. Sideband suppres-sion limitations due to the phase modulator, its driving electronics, and the light source spectral characteristics are presented with experimentally demonstrated suppressions of ...
C. Laskoskie, H. Hung, C. L. Chang
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Optics Letters, 2020
In interferometry, reaching a high signal-to-noise ratio at low frequencies can be challenging when the additive noise is nonstationary. Although this problem is typically solved by inserting a frequency shifter into one of the arms, in some cases, the interferometer cannot or should not be modified in this way.
Vincent Michaud-Belleau +4 more
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In interferometry, reaching a high signal-to-noise ratio at low frequencies can be challenging when the additive noise is nonstationary. Although this problem is typically solved by inserting a frequency shifter into one of the arms, in some cases, the interferometer cannot or should not be modified in this way.
Vincent Michaud-Belleau +4 more
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Resonator fiber optic gyro with bipolar digital Serrodyne Modulation Scheme
SPIE Proceedings, 2012We have proposed and studied a resonator fiber optic gyro (R-FOG) with bipolar digital serrodyne phase modulation scheme. The serrodyne modulation serves multiple functions from reducing noises caused by fiber characteristics, such as backscattering and optical Kerr effect, to achieving gyro signal processing including closed-loop operation.
Xijing Wang +3 more
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Single-modulator, dual comb serrodyne spectroscopy
Optics LettersDual optical frequency comb spectroscopy allows for high speed, broadband measurements without any moving parts. Here, we combine differential chirp downconversion to probe large spectral bandwidths and serrodyne modulation to separate the positive and negative sidebands in a single modulator.
Jasper R. Stroud +2 more
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Coherent backscatter‐induced noise in optical fiber gyroscopes with serrodyne modulation
Electronics and Communications in Japan (Part II: Electronics), 1988AbstractCoherent backscattered light produces considerable noise in optical fiber gyroscopes. The noise in serrodyne‐modulated optical‐fiber gyroscopes with a low‐coherence source is studied theoretically for various forms of serrodyne‐modulation functions. The noise in output signals from the lock‐in amplifier is analyzed for the closed‐loop gyroscope.
Yoichi Suzuki, Eikichi Yamashita
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An Eight - Phase Broadband Serrodyne Modulator
MTT-S International Microwave Symposium Digest, 2005The design of a 6 to 18 GHz serrodyne modulator is described. It consists of a P-I-N diodes based all passive eight step phase shifter. The device is digitally controlled. Experimental data and a comparison with a conventional serrodyne TWT are presented.
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