[8p-B12-1~6] 3.7 Optical measurement, instrumentation, and sensor

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)

[8p-B12-5] Miniaturization of a laser Doppler velocimeter using an on-chip fringe-pattern laser

〇Hiroki Kumon¹, Kazuyoshi Hirose¹, Shu Honma¹, Hiroki Kamei¹, Hidenao Yamada¹ (1.Hamamatsu Photonics)

Keywords:

laser Doppler velocimeter,photonic-crystal laser,microchannel

We propose a compact laser Doppler velocimeter based on an on-chip fringe-pattern laser. Interference fringes were directly generated in a microchannel using a holographically modulated two-dimensional photonic crystal, and particle velocity was calculated from the frequency of the forward-scattered light. This approach enables robust particle velocity measurement without requiring a complex optical system.