Inventor

FREDERICK DONALD A

US19 patents

⚠️ This page may combine multiple inventors who share the name “FREDERICK DONALD A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

FREDERICK DONALD A

LITTON SYSTEMS INC

Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensors

System for splicing sensors into a multiple fiber optical cable

Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensors

Long distance, all-optical telemetry for fiber optic sensor using remote optically pumped EDFAs

WDM/FDM fiber optic sensor architecture using WDM tap coupler

Extended, flexible, spatially weighted fiber optic interferometric hydrophone

Coherence multiplexed interferometric signal processing system and method

Fiber optic hydrophone having rigid mandrel

Acoustic sensing system for downhole seismic applications utilizing an array of fiber optic sensors

System for multiplexed high resolution measurement of frequency variations in multimode fiber laser acoustic sensors

Apparatus and method for detecting rotation rate, Faraday bias and cavity length in a ring laser gyroscope

Architecture for large optical fiber array using standard 1×2 couplers

Pressure vessel

Method for determining the phase difference of light waves propagated over two paths

Architecture for large optical fiber array using standard 1×2 couplers

Sensing method and apparatus

L 3 COMM CORP

Repairable fiber optic hydrophone assembly

(unassigned)

TDM array of optical non-acoustic pressure sensors

NORTHROP GRUMMAN CORP

Architecture for large optical fiber array using standard 1×2 couplers