Basic research on the optical pulse transmission and nonlinear phenomina in the photonic crystal slab waveguide

光子晶体板条波导中光脉冲传输及非线性现象的基础研究

基本信息

批准号：
18360030
负责人：
ASAKAWA Kiyoshi
金额：
$ 9.25万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360030/
关键词：
Photonic crystal waveguide Nonlinear optics Optical Kerr effect Self-phase modulation Stimulated Raman scatterin Ultra-small all-optical switch Ultra-fast speed Low consumption enegy

项目摘要

It is well known that two-dimensional (2D) photonic-crystal (PC) slab waveguides (WGs) exhibit the noticeable light propagation characteristics. A typical example is that the light can pass through an abruptly bent corner of those line-defect WGs without any appreciable loss, resulting in being very attractive for ultra-small and low-energy optical integrated circuits (PIC). This is caused by the fact that the PC-slab WG has the advantage of tight light confinement vertically due to total internal reflection and laterally due to photonic band gap (PBG) effect, respectively. Moreover, that the group velocity vg^<WG> is small makes the power inside the WG larger by a factor n_g= (vg^<0>/vg^<WG>), being very advantageous to optical nonlinear (ONL) phenomena. So far, passive PC components have already been successfully developed, active components such as all-optical switch, buffer memory and optical amplifier have seldom been developed except a few cases. One of the best ways to develop u … More ltra-fast active components is to make efficient use of ONL phenomena such as stimulated Raman scattering (SRS) and self-or cross-phase-modulation (SPM or XPM) due to instantaneous optical Kerr effect. AlGaAs-based PC WGs have the advantage over the Si-based ones of avoiding two-photon absorption (TPA). Different from the case of Si, the TPA in the AlGaAs is practically avoided by increasing Al-content, thus increasing the electronic band gap.In this work, we first observed the SPM-induced spectral broadening for PC-slab WGs in a wavelength range from 1,460 to 1,535 nm; the SPM (or a phase shift) due to the nonlinear refractive index n_2 leads to a marked spectral evolution as the input pulse power P_<in> is increased. We have examined the spectrum of the light-pulse transmitted through an Al_<0.26>Ga_<0.74>As-based sample, by varying the power of incident pulse with T_0 (pulse duration) =1.6 ps. As a result, we found that the spectrum gets broader with increase of P_<in>, and on further increasing, develops a double-peak structure, corresponding to a phase shift of 1.3 π. The power required for this shift is estimated to be as small as 〜1.4 W for a 1.0 mm-long sample. The estimated n_2-value is 〜1.3 X 10^<-13>cm^2/W. On the other hand, the SRS has the potential for developing a light amplifier and a compact light source. Until now, however, no experimental work has been reported yet on SRS for the PC-slab WG In this connection we mention that several successful works on SRS have already been reported on GaP-based-and Si-based wire-WGs. So, we performed a pump-probe experiment of SRS amplification of light around 1,550 nm in an Al_<0.26>Ga_<0.74>As-based PhC-slab WG As a result, we observed more than 6 dB signal amplification with pump pulse energy of 22 pJ in an effective sample-length of 〜0.5 mm, which corresponds to a net gain of 〜3 dB. This result encourages us to develop an ultra-fast all-optical switch in future. Less

众所周知，二维（2D）光子晶体（PC）平板波导（WGS）表现出明显的光传播特性。一个典型的例子是，光线可以穿过那些线索缺陷的WG的突然弯曲的角落，而不会造成任何欣赏的损失，从而对超小和低能的光学集成电路（PIC）非常有吸引力。这是由于以下事实，即PC-SLAB WG具有垂直垂直限制的优势，这是由于总内部反射，并且分别是由于光子带隙（PBG）效应侧面造成的。此外，组速度VG^<wg>很小，使WG内部的功率更大，而n_g =（Vg^<0>/vg^<wg>），对光学非线性（ONL）现象非常有利。到目前为止，已经成功地开发了被动PC组件，除几种情况外，很少开发出活跃的组件，例如全光开关，缓冲器存储器和光学放大器。开发U的最佳方法之一…更多的LTRA-FAST活性组件是由于瞬时光学kerr效应而有效利用诸如刺激的拉曼散射（SRS）和自我或自我跨相调（SPM或XPM）之类的ONL现象。基于藻类的PC WGS比基于SI的避免两光子滥用（TPA）具有优势。与SI的情况不同，藻类中的TPA实际上是通过增加Al-content来避免的，从而增加了电子带缝。由于输入脉冲功率P_ <in>增加，由于非线性折射率N_2引起的SPM（或相移）导致了明显的光谱演化。我们已经通过用T_0（脉冲持续时间）= 1.6 ps改变了通过Al_ <0.26> ga_ <0.74>的光脉冲的光脉冲的光谱。结果，我们发现频谱随着P_ <in>的增加而变得更宽，并且在进一步增加时会发展出双峰结构，对应于1.3π的相位移位。对于1.0毫米长的样品，估计这种偏移所需的功率小于〜1.4 w。估计的N_2值为〜1.3 x 10^<-13> cm^2/w。另一方面，SRS具有开发光放大器和紧凑光源的潜力。但是，到目前为止，在这方面，尚未在PC-SLAB WG上进行SRS的实验性工作，我们提到已经在基于GAP和基于SI的Wire-WGS上已经报道过有关SRS的几项成功作品。因此，我们在Al_ <0.26> ga__ <0.74>中进行了1,550 nm的SRS放大的泵探针实验，结果是基于PHC-SLAB WG，我们观察到6 dB信号的泵脉冲能量超过22 pj，有效样品长度为〜0.5 mm，〜0.5 mm，〜0.5 mm，〜0.5 mm，对应于〜3 db，〜3 db。这一结果鼓励我们将来开发超快速的全光开关。较少的

项目成果

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Observation of Raman Scattering in GaAs photonic-crystal slab waveguides

GaAs 光子晶体板波导中拉曼散射的观察

DOI：
发表时间：
2006
期刊：
Optics Express 14
影响因子：
0
作者：
Hisaya Oda;Kuon Inoue;Naoki Ikeda;Yoshimasa Su ig moto;and Kivoshi Asakawa,
通讯作者：
and Kivoshi Asakawa,

Self-phase modulation in photonic-crystal-slab line-defect waveguides

DOI：
10.1063/1.2746068
发表时间：
2007-06
期刊：
Applied Physics Letters
影响因子：
4
作者：
H. Oda;Kuon Inoue;Y. Tanaka;N. Ikeda;Y. Sugimoto;H. Ishikawa;K. Asakawa
通讯作者：
H. Oda;Kuon Inoue;Y. Tanaka;N. Ikeda;Y. Sugimoto;H. Ishikawa;K. Asakawa

Light/matter optical nonlinear interaction in the photonic crystal slab waveguide

光子晶体板波导中的光/物质光学非线性相互作用

DOI：
发表时间：
2007
期刊：
Toyota Research Report vol.90(23)
影响因子：
0
作者：
Hasaya. Oda;Kuon Inoue;Yu Tanaka;Naoki Ikeda;Yoshimasa Sugimoto;Hiroshi;Ishikawa;and Kiyoshi Asakawa;Kuon Inoue
通讯作者：
Kuon Inoue

Observation of self-phase modulation in AlGaAs photonic-crystal slab waveguides

AlGaAs 光子晶体板波导中自相位调制的观察