Ultrahighly sensitive laser-Doppler velocity meter with a diode-pumped Nd:YVO4 microchip laser

S. Okamoto, H. Takeda, F. Kannari

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


Extremely high sensitivity of a diode-pumped microchip Nd:YVO4 laser to external light injection is demonstrated in optical detection of Doppler shift from a moving object. Intensity modulation induced by reflected scattered light from a rotating object at the Doppler-shift frequency is measured for a 1-mm-long diode-pumped Nd:YVO4 laser. When adjusting the diode pump power so that the relaxation oscillation frequency is resonant to the Doppler-shift frequency, the minimum detectable intensity of scattered light injected back into the microchip laser can be <-170 dB weaker than the intracavity laser intensity.

Original languageEnglish
Pages (from-to)3116-3120
Number of pages5
JournalReview of Scientific Instruments
Issue number5
Publication statusPublished - 1995

ASJC Scopus subject areas

  • Instrumentation


Dive into the research topics of 'Ultrahighly sensitive laser-Doppler velocity meter with a diode-pumped Nd:YVO<sub>4</sub> microchip laser'. Together they form a unique fingerprint.

Cite this