Development of a Ultra-wideband Optical Sweep Generator by Using Optical Mixing of Semiconductor Lasers

利用半导体激光器光学混频开发超宽带光扫描发生器

• 批准号: 01850015
• 负责人: OHTSU Motoichi
• 金额: $ 5.31万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B).
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01850015/
• 关键词: Semicondutor laser,; Second harmonics,; Optical phase locking,; Injection locking,; High coherence,; Spectral linewidth; 非線形光学; 位相同期; 超伝導

An organic nonlinear optical wave-guide was fabricated for second harmonic generation. The second harmonic wave was observed by incidenting a YAG laser light into the wave-guide. To fabricate a two dimensional organic DFB wave-guide for optical parametric oscillator, a single crystal film as wide as 25mm x 50mm, was grown. Two dimensional DFB was also fabricated on the glass surface.To realize an optical phase locking between the 1.56um and 0.78um lasers, optical frequency link using a second harmonics and rubidium spectral line was constructed and its operation was confirmed. To improve the accuracy of the Optical phase locking, wideband phase locking loop, as wide as 134MHz, was made by which the phase error variance was reduced to 0.02 radian^2. Furthermore, in order to use as primary light sources for these system, spectral linewidths of 1.56um and 0.83um lasers were reduced to 250Hz and 7Hz, respectively. To amplify the powers of these laser, injection locking of these lasers to multi-mode high power laser was tried. As a result, side mode suppression ratio and power concentration ratio as high as 30dB and 99%, respectively, were achieved.By these results, it was confirmed that an accurate frequency sweep with 700THz range, was confirmed.

制作了一种用于二次谐波产生的有机非线性光波导。通过将一束激光入射到波导中，观察到了二次谐波。为了制作用于光学参量振荡器的二维有机DFB波导，生长了宽度为25 mm×50 mm的单晶膜。为了实现1.56微米和0.78微米激光之间的光学锁相，构建了利用二次谐波和Rb谱线的光学频率链，并对其工作进行了验证。为了提高光学锁相的精度，制作了宽达134 MHz的宽带锁相环，使相位误差方差减小到0.02弧度2。此外，为了作为系统的主光源，1.56微米和0.83微米激光器的光谱线宽分别减小到250赫兹和7赫兹。为了放大这些激光器的功率，尝试了将这些激光器注入锁定为多模高功率激光器。结果表明，其边模抑制比和功率聚集率分别高达30dB和99%，验证了700THz频率范围的精确扫频。

项目成果

Motoichi OHTSU,Hiromasa SUZUKI,Koushichi NEMOTO,and Yasuaki TERAMACRI: "NarrocwーLinewidth Tunable Visible InGaInP Laser,Application to Spectral Measurements of Lithium and Power Amplification" Jpn.J.Appl.Phys.29. 1463-1465 (1990)

Motoichi OHTSU、Hiromasa SUZUKI、Koushichi NEMOTO 和 Yasuaki TERAMACRI：“Narrocwー线宽可调谐可见 InGaInP 激光器，锂光谱测量和功率放大的应用”Jpn.J.Appl.Phys.29 (1990)。

C. -H. Shin and M. Ohtsu: "Improved Allan Variance Real Time Processing System to Measure Frequency Tracking Error of Hetero-dyne Optical Phase-Locked Loops" Electron. Letters. 26-19. 1571-1572 (1990)

C.-H。

大津元一: "超高コヒ-レント光の発生 刷中" 朝倉書店, 300ペ-ジ (1990)

大津元一：“超高相干光的产生 - 印刷”朝仓书店，300 页（1990 年）

K. Kuboki and M. Ohtsu: "An Allan Variance Real-Time Processing System for Frequency Stability Measurements of Semiconductor lasers"" IEEE Trans. Instrum. and Meas.39-4. 637-641 (1990)

K. Kuboki 和 M. Ohtsu：“用于半导体激光器频率稳定性测量的艾伦方差实时处理系统”” IEEE Trans. Instrum. and Meas.39-4. 637-641 (1990)

M. Ohtsu: Asakura-Publishing, Co.Coherent Quantum Optics and Technology,179 (1990)

M. Ohtsu：Asakura-Publishing，Co.Coherent Quantum Optics and Technology，179 (1990)