Gyro and semiconductor device having a plurality of laser diodes
US6304329A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Oct 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a gyro which has a ring resonator type laser diode, and which detects a beat signal attendant on rotation, a plurality of laser diodes are disposed on an identical substrate, thereby to exhibit a wide detection range for angular velocities. In the gyro, active layers of the laser diodes may be arranged separately from one another. A semiconductor device includes a plurality of ring resonator type laser diodes, each of which undergoes a voltage change or a change in a driving current in attendance on a magnitude of an applied angular velocity when subjected to constant-current drive, and which are disposed in a single frame or on a single substrate. In the semiconductor device, the ring resonator type laser diodes may be disposed on an identical surface of the single substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.