Title

Microwave-modulated photon doppler velocimetry

Document Type

Article

Date of Original Version

2-1-2016

Abstract

Photon Doppler velocimetry (PDV) has become an important technique for explosives diagnostics over the last two decades. However, the inherent necessity for a very highspeed digitizer has rendered this technology expensive and inaccessible to the general research community. This letter reports a microwave-modulated PDV method, based on the conventional PDV testing, in which an RF modulator was used to directly modulate the current of a laser transmitter. Carrying the modulated frequency, the received PDV beat frequency was then engaged with a second beat frequency at the photo receiver, resulting in a low detection frequency. This resulting frequency can be detected using a digitizer with a lower sampling rate while retaining the information necessary for high-speed velocimetry measurement.

Publication Title

IEEE Photonics Technology Letters

Volume

28

Issue

3

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