Rotation measurement with the use of a pulsed Er-doped fiber laser with integrated optic circuit: Proposal, simple theory, and experiment
✍ Scribed by Chao-Xiang Shi
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 145 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
We propose a no¨el pulsed fiber laser rotation sensor with a LiNbO integrated optic circuit, Sagnac fiber loop, Er-doped fiber, and 3 semiconductor pumping lasers. A simple analysis is completed and the output equation is deri¨ed. The ¨ariance of the output pulse when rotation occurs is also analyzed. In addition, we also conducted a related experiment for rotation measurement. When the gain of the fiber amplifier is o¨er the round-trip loss and the phase modulation frequency satisfies the total round-trip time, this optical system produces the laser emission in a pulse state. The rotation rate is measured from the shift of the peak position of the output pulse. It is shown that the resolution of rotation measurement increases if we use a smaller phase modulation depth. But the sharpness of the optical pulse must be maintained by ( ) reducing the losses or increasing the gain of optical amplifier in the whole optical system.