Spatial light modulation for ultra-fast optics by wave-mixing in saturable amplifier

通过可饱和放大器中的混波实现超快光学的空间光调制

• 批准号: 13650037
• 负责人: OMATSU Takashige
• 金额: $ 2.11万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650037/
• 关键词: Optical Phase Conjugation; Solid dye laser; Ultra-fast Optics; Saturable amplification; Nonlinear Optics; 位相共役鏡; 光空間変調器; 固体色素; 位相共役波発生; 利得回折格子; 固体色素レーザー; ホログラム; 色素凝集体; 波長可変レーザー; 縮退四光波混合

Ultrafast lasers in pico-and femto-second regime have received intense attention in many fields : including extra-ultra-violet generation, laser machining, spectroscopy, and medical applications, etc. These applications require laser sources with high beam quality.An effective solution to correct an aberration in the laser system and generate high quality output is phase conjugation. Phase conjugation by four-wave mixing in a saturable gain medium has been an attractive subject because of its high phase conjugate reflectivity and fast temporal response. To date, efficient phase conjugation in the nano-second or CW regime has been, demonstrated.However, efficient phase conjugation in pico-and femto-second regime requires a broad emission band as well as a high small-signal gain, which makes ultrafast operation more difficult to achieve. A solid laser dye is a promising material for an efficient and tunable solid-state phase conjugate mirror because of its large stimulated emission cross-section and broad fluorescence band in the visible and near-infrared regions.We have demonstrated efficient phase conjugation for pico-second pulses with a solid dye. A phase conjugate reflectivity of 2.5 times was obtained. This value is the highest, to our knowledge, obtained by four-wave mixing in the pico-second regime.

Pico和Femto秒的超快激光器在许多领域都受到了极大的关注：包括超紫外线产生，激光加工，光谱和医疗应用等。这些应用需要具有高光束质量的激光源。有效的解决方案以纠正激光系统中的差异和产生高质量质量的输出。在饱和增益培养基中通过四波混合的相结合是一个有吸引力的主题，因为其高相结合反射率和快速的时间响应。迄今为止，已经证明了纳米秒或CW制度中的有效相结合。但是，在PICO和FEMTO秒制度中的有效相结合需要广泛的发射条带，以及高的小信号增益，这使得超快操作变得更加困难。固体激光染料是一种有前途的材料，用于有效且可调的固态相结合镜，因为它具有较大的刺激发射横截面和可见且近红外区域中的宽荧光带。获得了2.5次的相结合反射率。据我们所知，该值是在Pico秒制度中通过四波混合而获得的最高值。

项目成果

T.Yonekawa, T.Omatsu: "Self-diffraction of pico-second pulses in a saturable amplifier polymer dye"Optics Communications. (in press). (2002)

T.Yonekawa、T.Omatsu：“可饱和放大器聚合物染料中皮秒脉冲的自衍射”光学通讯。

T.Omatsu, Y.Ojima et al.: "150 times phase conjugation by degenerate four-wave-mixing in a continuous-wave Nd : YVO_4 amplifier"Applied Physics B. 75. 493-495 (2002)

T.Omatsu、Y.Ojima 等人：“连续波 Nd : YVO_4 放大器中简并四波混频的 150 倍相位共轭”应用物理学 B.75.493-495 (2002)

T.Hirose, T.Omatsu, et al.: "Azo-beuzene polymer thin-film laser amplifier with grating couplers based on light-induced relief hologram"Optics Communications. 228. 279-283 (2003)

T.Hirose、T.Omatsu 等人：“基于光诱导浮雕全息图的带有光栅耦合器的偶氮苯聚合物薄膜激光放大器”光学通讯。

T.Hirose, T.Omatsu, et al.: "Azo-benzene polymer thin-film laser amplifier with grating couplers based on light-induced relief hologram"Optics Communications. 228. 279-283 (2003)

T.Hirose、T.Omatsu 等人：“基于光诱导浮雕全息图的带有光栅耦合器的偶氮苯聚合物薄膜激光放大器”光学通讯。

T.Yonekawa, T.Omatsu et al.: "Self-diffraction of pico-second pulses in a saturable amplifier polymer dye"Optics Communications. 206. 165-170 (2002)

T.Yonekawa、T.Omatsu 等人：“可饱和放大器聚合物染料中皮秒脉冲的自衍射”光学通讯。