Coherent FMCW reflectometry using a temperature tuned Nd; YAG ring laser

Journal Article · Sat Dec 01 04:00:00 EST 1990 · IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/68.62024· OSTI ID:5933405

Sorin, W V; Donald, D K; Newton, S A ^[1]; Nazarathy, M ^[2]

---

1. Hewlett-Packard Co., Palo Alto, CA (USA)
2. Harmonic Lightwaves, Santa Clara, CA (US)

A long coherence length, diode-pumped, monolithic Nd:YAG laser operating at 1.32 {mu}m is used to perform coherent FMCW reflectometry measurements. Compared with semiconductor-based lasers, the low phase noise of the Nd:YAG source offers greatly increased distance range combined with increased sensitivity to optical reflections. Measurement of Rayleigh backscatter from 50 km of fiber is demonstrated with over 60 dB of two-way optical dynamic range. Two-point spatial resolution is demonstrated to be better than 10 cm. This source and coherent measurement technique may have potential for both short and long haul reflectometry applications.

• OSTI ID: 5933405
• Journal Information: IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (USA) Vol. 2:12; ISSN IPTLE; ISSN 1041-1135
• Country of Publication: United States
• Language: English

Related Subjects

440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ALLOYS
COHERENT SCATTERING
DIMENSIONS
ELECTROMAGNETIC RADIATION
FERRITE GARNETS
FIBERS
INFRARED RADIATION
LASERS
LENGTH
MINERALS
NEAR INFRARED RADIATION
NEODYMIUM ADDITIONS
NEODYMIUM ALLOYS
RADIATIONS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RAYLEIGH SCATTERING
REFLECTION
RESOLUTION
RING LASERS
SCATTERING
SILICATE MINERALS
SOLID STATE LASERS
TUNING
USES