| Project/Area Number |
06555012
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 試験 |
|---|
| Research Field |
Applied optics/Quantum optical engineering
|
|---|
| Research Institution | TOHOKU UNIVERSITY |
|---|
Principal Investigator |
ITO Hiromasa Tohoku University, RIE RIEC : Research Institute of Electrical Communication, Professor, 電気通信研究所, 教授 (20006274)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SATO Manabu Tohoku University, RIEC RIEC : Research Institute of Electrical Communication, R, 電気通信研究所, 助手 (50226007)
TANIUSHI Tetsuo Tohoku University, RIEC RIEC : Research Institute of Electrical Communication, A, 電気通信研究所, 助教授 (80260446)
FUKUDA Tsuguo Tohoku University, IMR IMRC : Institute for Materials Research, Professor, 金属材料研究所, 教授 (30199236)
伊藤 弘昌 東北大学, 電気通信研究所, 教授 (20006274)
|
|---|
| Project Period (FY) |
1994 – 1996
|
| Project Status |
Completed (Fiscal Year 1996)
|
| Budget Amount *help |
¥18,500,000 (Direct Cost: ¥18,500,000)
Fiscal Year 1996: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1995: ¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1994: ¥9,800,000 (Direct Cost: ¥9,800,000)
|
|---|
| Keywords | domain inversion / lithium tantalate / solid-state laser / nonlinear optics / Q switching / Qスイッチ / レーザ / 活性イオン / 非線形光学結晶 / 個体レーザ / 集積型 / 多機能化 |
|---|
| Research Abstract |
I.sigma and pi lasing at 1.092mum and 1.082mum, respectively in single Nd : LiTaO_3 crystal with simple resonator structures have been demonstrated. Threshold values of about 11mW,8mW and slope efficiency of 16.8%, 11.7% are obtained from uncoated samples with pi and sigma lasing, respectively.
II.An integrated electro-optic Q-switched laser by combining the laser gain and electro-optic effect in a bulk domain inverted single Nd : LiTaO_3 crystal has been demonstrated. The Q-switched laser based on this technique could generate 24.7ns pulses at 150Hz with peak power of 148W.Compact Q-switched operation with a diode laser has also been demonstrated here.
III.We showed intracavity QPM-SHG and simultaneous Q-switched operation of periodically poled Nd : LiTaO_3 crystal. This has become possible by means of the combined exploitation of both the nonlinear and the electro-optic properties of the activated host. Using this method 39ns green pulses with a peak power of 2.6W have been obtained by pumping with a 0.7W fiber coupled LD.
|
