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15 June 2023 Optical spectrum analyzer based on pulsed Brillouin lasing
Joseph B. Murray, Matthew J. Murray, Brandon Redding
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Proceedings Volume 12516, Next-Generation Spectroscopic Technologies XV; 125160P (2023) https://doi.org/10.1117/12.2663826
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States
Abstract
We introduce an optical spectrum analyzer that relies on the linear relationship between optical frequency and the Brillouin frequency shift (BFS) in optical fiber. To measure the Brillouin frequency shift, we use the signal under test as a “pump” to excite Brillouin lasing in a fiber ring cavity and use self-referenced heterodyne detection to measure the frequency shift of this Brillouin lasing mode. We present the basic operation of the system and demonstrate wideband measurements over ~48 nm with 20 MHz (0.16 pm) resolution at a measurement rate of 10 kHz.
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Joseph B. Murray, Matthew J. Murray, and Brandon Redding "Optical spectrum analyzer based on pulsed Brillouin lasing", Proc. SPIE 12516, Next-Generation Spectroscopic Technologies XV, 125160P (15 June 2023); https://doi.org/10.1117/12.2663826
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KEYWORDS
Spectrum analysis
Optical fibers
Signal detection
Heterodyning
Modulators
Photonic devices
Spectral resolution
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