2004 Fiscal Year Final Research Report Summary

Study on Sensing Head for Selfmixing Laser Doppler Velocimeter

Research Project

Project/Area Number	15560307
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Electron device/Electronic equipment
Research Institution	Tokai University
Principal Investigator	SHIBUYA Takehisa Tokai University, School of Engineering, Associate Professor, 工学部, 助教授 (90235599)
Co-Investigator(Kenkyū-buntansha)	MIKAMI Osamu Tokai University, School of Information Technology and Electronics, Professor, 電子情報学部, 教授 (30266366)
Project Period (FY)	2003 – 2004
Keywords	Laser Diode / Self mixing Effect / Doppler-shifted Frequency / Velocimeter / Y-branching Waveguide / Integrated Optical Circuit
Research Abstract	We have proposed a new structure of two-beam irradiation head using Y-branching waveguides and a fiber lens for Selfmixing laser Doppler Velocimeter. First, velocity measurement was studied with Y-branching waveguides only. Then, setting a fiber lens on the edge of Y-branching waveguides, we accomplished the experiment. Comparison between a single-mode fiber (SMF) and a plastic optical fiber (POF) as a fiber lens was made. It was confirmed that the sensor head of compact LDV was possible. In addition, we found that a new structure of two-beam irradiation head using a V-shape fiber. Two-beam irradiation was successfully achieved and the object velocity could be measured using a single fiber.

(1 results)