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12 November 1999 RF and millimeter-wave photonics at Sandia National Laboratories
G. Allen Vawter, Charles T. Sullivan
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Proceedings Volume 3795, Terahertz and Gigahertz Photonics; (1999) https://doi.org/10.1117/12.370190
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States
Abstract
RF and mm-wave photonic devices and circuits have been developed at Sandia National Laboratories for applications ranging from RF optical data links to optical generation of mm-wave frequencies. This talk will explore recent high- speed photonics technology developments at Sandia including: (1) A monolithic optical integrated circuit for all-optical generation of mm-waves. Using integrated mode-locked diode lasers, amplifiers, and detectors, frequencies between 30 GHz and 90 GHz are generated by a single monolithic (Al,Ga)As optical circuit less than 2 mm in its largest dimension. (2) Development of polarization-maintaining, low- insertion-loss, low v-pi, Mach-Zehnder interferometer modulators with DC-to-potentially-K-band modulation bandwidth. New low-loss polarization-maintaining waveguide designs using binary alloys have been shown to reduce polarization crosstalk in undoped (Al,Ga)As waveguides, yielding high extinction ratio (> 40 dB) and low on-chip loss (< 6 dB) in Mach-Zehnder interferometers. RF drive voltage is reduced through use of 45 mm-active length devices with modulator sensitivity, v-pi, less than 3 V.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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G. Allen Vawter and Charles T. Sullivan "RF and millimeter-wave photonics at Sandia National Laboratories", Proc. SPIE 3795, Terahertz and Gigahertz Photonics, (12 November 1999); https://doi.org/10.1117/12.370190
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KEYWORDS
Waveguides
Photonic integrated circuits
Optical amplifiers
Modulators
Mode locking
Semiconductor lasers
Mach-Zehnder interferometers
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