Research on Multi-Functional Nonlinear-Optic Devices using Domain Superlattices

利用域超晶格的多功能非线性光学器件研究

• 批准号: 06555012
• 负责人: ITO Hiromasa
• 金额: $ 11.84万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555012/
• 关键词: 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

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.

在单一Nd: LiTaO_3晶体中，用简单的谐振腔结构证明了1 σ和π分别在1.092和1.082 μ m处产生激光。采用pi和sigma激光，得到的阈值分别为11mW和8mW，斜率效率分别为16.8%和11.7%。ii .在块畴倒转单Nd: LiTaO_3晶体中实现了激光增益和电光效应相结合的集成电光调q激光器。基于该技术的调q激光器可产生24.7ns脉冲，脉冲频率为150Hz，峰值功率为148W。本文还演示了用二极管激光器进行紧凑的调q操作。iii .我们展示了周期极化Nd: LiTaO_3晶体的腔内QPM-SHG和同时调q操作。这是通过结合利用被激活主体的非线性和电光特性而成为可能的。利用该方法，用0.7W光纤耦合LD抽运获得了峰值功率为2.6W的39ns绿色脉冲。

项目成果

K.S.Abedin: "Integrated intracavity quasi-phase-matched second harmonic generation based on periodically poled Nd:LiTaO_3," Appl.Phys.Lett.,. 70・1. 10-12 (1997)

K.S.Abedin：“基于周期性极化 Nd:LiTaO_3 的集成腔内准相位匹配二次谐波生成”，Appl.Phys.Lett., 70・1 (1997)。

アベディン、他: "Nd:LiTaO_3のCWレーザ発振" 電子情報通信学会秋季ソサイアティ先行大会予稿集. C-283 (1994)

Abedin 等人：“Nd:LiTaO_3 的连续激光振荡”IEICE 秋季学会高级会议 C-283 会议记录（1994 年）。

アベディン、他: "Nd:LiTaO_3によりπおよびσ偏波CW室温レーザ発振" 第55回応用物理学秋季関係連合講演会講演予稿集. No.3. 970 (1994)

Abedin 等人：“Nd:LiTaO_3 的 π 和 σ 偏振 CW 室温激光振荡”第 55 届秋季应用物理会议论文集，第 3. 970 号（1994 年）。

佐藤 学: "電界印加法によるバルク型LiTaO_3ドメイン反転格子" 電子情報通信学会論文誌. J78-C-I. 366-372 (1995)

Manabu Sato：“通过电场应用方法的块状LiTaO_3域反转晶格”电子、信息和通信工程师学会学报J78-C-I 366-372（1995）。

K.S.Abedin: "Temperature-dependent dispersion relation of ferroelectric lithium tantalate," J.Appl.Phys.80. 6561-6563 (1997)

K.S.Abedin：“铁电钽酸锂的温度相关色散关系”，J.Appl.Phys.80。