Time-stretched photonic Doppler velocimetry
Inertial confinement fusion facilities generate implosions at speeds greater than 100 km/s, and measuring the material velocities is important and challenging. We have developed a new velocimetry technique that uses time-stretched spectral interferometry to increase the measurable velocity range normally limited by the detector bandwidth. In this approach, the signal is encoded on a chirped laser pulse that is stretched in time to reduce the beat frequency before detection. We demonstrate the technique on an imploding liner experiment at the Sandia National Laboratories’ Z machine, where beat frequencies in excess of 50 GHz were measured with 20 GHz bandwidth detection.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- Grant/Contract Number:
- NA0003525; NA0003624; AC04-94AL85000
- OSTI ID:
- 1557922
- Alternate ID(s):
- OSTI ID: 1570296
- Report Number(s):
- SAND-2019-10025J; OPEXFF
- Journal Information:
- Optics Express, Journal Name: Optics Express Vol. 27 Journal Issue: 18; ISSN 1094-4087
- Publisher:
- Optical Society of AmericaCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 16 works
Citation information provided by
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Web of Science
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