| Type of Document |
Master's Thesis |
| Author |
Lally, Evan Michael
|
| Author's Email Address |
evlally@vt.edu |
| URN |
etd-08242006-115533 |
| Title |
A Narrow-Linewidth Laser at 1550 nm Using the Pound-Drever-Hall Stabilization Technique |
| Degree |
Master of Science |
| Department |
Electrical and Computer Engineering |
| Advisory Committee |
| Advisor Name |
Title |
| Anbo Wang |
Committee Chair |
| Ahmad Safaai-Jazi |
Committee Member |
| Gary S. Brown |
Committee Member |
| Randy Heflin |
Committee Member |
|
| Keywords |
- Linewidth
- Pound-Drever-Hall
- Fabry-Perot
- Laser
- Infrared
- Fiber
- Frequency Noise
- Phase Lock
- Stabilization
|
| Date of Defense |
2006-08-11 |
| Availability |
unrestricted |
Abstract
Linewidth is a measure of the frequency stability of any kind of oscillator, and it is a defining characteristic of coherent lasers. Narrow linewidth laser technology, particularly in the field of fiber-based infrared lasers, has progressed to the point where highly stable sources are commercially available with linewidths on the order of 1-100 kHz. In order to achieve a higher level of stability, the laser must be augmented by an external frequency stabilization system.
This paper presents the design and operation of a frequency locking system for infrared fiber lasers. Using the Pound-Drever-Hall technique, the system significantly reduces the linewidth of an input laser with an un-stabilized linewidth of 2 kHz. It uses a high-finesse Fabry-Perot cavity, which is mechanically and thermally isolated, as a frequency reference to measure the time-varying frequency of the input laser. An electronic feedback loop works to correct the frequency error and maintain constant optical power. Testing has proven the Pound-Drever-Hall system to be highly stable and capable of operating continuously for several seconds at a time.
|
| Files |
| Filename |
Size |
Approximate Download Time
(Hours:Minutes:Seconds)
|
| 28.8 Modem |
56K Modem |
ISDN (64 Kb) |
ISDN (128 Kb) |
Higher-speed Access |
| |
evlallyMSthesis.pdf |
1.76 Mb |
00:08:09 |
00:04:11 |
00:03:40 |
00:01:50 |
00:00:09 |
|
