Abstract
The effect of geometry detection schemes and apertures on self-mixing speckle velocimeters was studied. The measurement system consisted of a heterojunction AlGaAs laser diode, a GRIN lens and a target surface placed on a translating stage. A moving rough surface was used to scatter the light emitted from laser diode into laser cavity to analyze self-mixing interference. A photodiode was also used to detect random variations in light intensity of self-mixing speckle signals. Analysis suggested that the use of self-mixing laser diode with larger detection and coupling apertures eliminated offset value and avoided critical velocity.
| Original language | English (US) |
|---|---|
| Title of host publication | Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest |
| Volume | 2 |
| State | Published - Dec 1 2001 |
| Event | 4th Pacific Rim Conference on Lasers and Electro-Optics - Chiba, Japan Duration: Jul 15 2001 → Jul 19 2001 |
Other
| Other | 4th Pacific Rim Conference on Lasers and Electro-Optics |
|---|---|
| Country/Territory | Japan |
| City | Chiba |
| Period | 7/15/01 → 7/19/01 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy