New connectiong technique of optical circuit by self-alignment of axs

本研究的目的是开发新的光路连接技术。通过这项新技术，光学轴可以自动地彼此重合。这种方法的原理如下。位相共轭波(PCW)在光路中包含两个光波导待拼接的两个位相共轭镜之间振荡。由于PCW特性的时间可逆性，即使存在连接缺陷，也有望获得与相位共轭波高的连接效率。在产生PCW之后，光波导间的光硬化树脂被PCW硬化。结果，在没有光学轴的对准操作的情况下，形成了两个光波导间的连接路径。我们称这种新方法为“自对准连接技术”。我们的实验研究揭示了以下结果：1.利用BaTiO_3单晶和514.5 nm的Ar~(2+)激光组成简并四波混频系统。在四波混频中，通过光纤传输光作为泵浦光束，实现了10000%的位相共轭反射效率。对于两根光纤的连接缺陷，PCW测量的连接效率高于常规光波。光硬化树脂通过从光纤边缘辐射的光路进行硬化。这些结果鼓励我们实现新的连接技术。由于还没有得到足够的PCW功率和两个位相共轭镜之间的PCW振荡，因此用这种方法自动形成连接路径还没有得到证实。我们将继续研究和解决这些问题。

The purpose of this studies is the development of new connecting technique of optical circuits. By the new technique, the optical axs may automatically coincide with each other. The principle of this method is as follows. The phase-conjugate wave (PCW) is oscillated between two phase-conjugate mirrors included two optical waveguide to be spliced in the optical path. The high connecting efficiency with the phase-conjugate wave is expected even though the existence of the connection imperfections because of the time reversibility of the PCW property. After the generation of the PCW,the light hardening resins among the optical waveguides are hardened by the PCW.As the result, the connection path between two optical waveguides is formed without the alignment manipulation of the optical axs. We call the new method as the "connection technique of the self-alignment type". Our experimental studies reveal the following results.1. The degenerate four wave mixing system was constructed with BaTiO_3 single crystal and 514.5nm wave from Argon ion laser. The phase-conjugate reflection efficiency of 10000% was realized by the propagating light through the fiber as pump beam in the four wave mixing.2. The connection efficiency against the connection imperfection of two fibers measured by the PCW was higher than that by the conventional light wave.3. The light hardening resins were hardened along by the light path radiated from the edge of the fiber.These results encourage realization of our new connecting technique. The automatic formation of the connection path by this method has not confirmed yet, because the sufficient power of PCW and the oscillation of PCW between two phase-conjugate mirrors have not obtained yet. We will continue to study and to resolve these problems.