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Photonic mm-wave generation using a double passband fiber Bragg grating filter

FIBER AND INTEGRATED OPTICS 2002年第3期21卷 233-241页

作者： Menders, J Diamond, C IPITEK Carlsbad CA 92008 USA

We report a simplified version of a mm-wave generator employing the sideband filtering technique which uses a single optical sideband filter. Instead of using a Mach-Zehnder-like fiber network to select a pair of sidebands, we employ a single Fabry-Perot fiber Bragg grating with a pair of passbands separated by the mm-wave frequency. Using a single filter eliminated the need for polarization control and path-length matching that was required by the former interferometer-like arrangement. We describe a 30 GHz generator design and present its mm-wave signal spectrum showing an instrument-limited linewidth of similar to20 Hz. The generation of such an extremely narrow signal spectrum from a laser with a 1 MHz linewidth demonstrates the remarkable laser frequency noise cancellation property of the sideband filtering technique.

关键词： mm-wave generator RF photonics fiber Bragg grating Fabry-Perot filter optical sideband generation phase modulation photonically controlled phased array

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Photonic mm-wave generation using a double passband fiber Bragg grating filter

Photonic mm-wave generation using a double passband fiber Br...

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Conference on Multifrequency Electronic/Photonic Devices and Systems for Dual-Use Applications

作者： Menders, J Diamond, C Miles, E IPITEK Carlsbad CA 92008 USA

ISBN: (纸本)0819442046

We report a simplified version of a nun-wave generator employing the sideband filtering technique which uses a single optical sideband filter. Instead of using a Mach-Zehnder-like fiber network to select a pair of sidebands, we employ a single Fabry-Perot fiber Bragg grating with a pair of passbands separated by the nun-wave frequency. Using a single filter, eliminated the need for polarization control and pathlength matching that was required by the former interferometer-like arrangement. We describe a 30 GHz generator design and present its nun-wave signal spectrum showing an instrument limited linewidth of similar to20 Hz. The generation of such an extremely narrow signal spectrum from a laser with a I MHz linewidth demonstrates the remarkable laser frequency noise cancellation property of the sideband filtering technique.

关键词： mm-wave generator RF photonics fiber Bragg grating Fabry-Perot filter optical sideband generation phase modulation photonically controlled phased array

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20 Hz linewidth mm-wave generation by optical sideband filtering

20 Hz linewidth mm-wave generation by optical sideband filte...

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Conference on Radio Frequency Photonic Devices and Systems

作者： Menders, J Miles, E Friesema, E Vallestero, N Tetra Tech Data Syst Carlsbad CA 92008 USA

ISBN: (纸本)0819437573

We generated a low phase noise 16 GHz electrical signal of 20 Hz linewidth from a single similar to1 MHz linewidth diode laser. At 36 GHz, our frequency agile mm-wave generator produced an electrical signal with an instrument resolution limited linewidth of <1 kHz. Our approach uses a relatively low frequency (4-8 GHz) phase modulator to generate a multiline sideband spectrum from a single mode laser, which is filtered to pass or select a pair of spectral lines. Interference between the lines on the active area of a photodetector produces an electrical signal that can be set between 4 and 60 GHz. By controlling the phase modulator frequency and amplitude we set the sideband frequency spacing between 4 and 8 GHz, and efficiently couple optical power into sidebands up to the fourth order. Rapid transitioning between sideband spectra best suited for a particular mm-wave frequency could be made in a few milliseconds using a programmable synthesizer and RF amplifier. Two-sideband selection was obtained by splitting the signal between two legs of a filter network and using ultra-narrowband fiber Bragg grating (FBG) fiber filters to select single lines. We controlled the fiber filter strain to tune the filters rapidly, setting the tension using PZT actuators. The generates prototype was packaged as a pair of portable twin rack modules under PC control.

关键词： mm-wave generator RF photonics fiber Bragg grating Fabry-Perot filter optical sideband generation phase modulation photonically controlled phased array

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