PDa02 ゲスト・ホスト液晶の高効率非線型光学効果を用いた全光型焦点可変レンズ

抄録

We present an all-optical focal length converter using both large optical nonlinearity and anisotropic complex refractive indices in guest-host nematic liquid crystals (GHLCs). The nonlinear phase modulation was generated by irradiating the GHLCs with a He-Ne laser beam (wavelength; 633 nm) having a Gaussian profile. A laser diode (LD) beam (wavelength; 788 nm) passed at the same point as the He-Ne laser beam spot. The phase of the LD beam was modulated and the LD beam was focused due to the phase modulation. The focal length of the LD beam was varied over a range of several centimeters by controlling the intensity of the He-Nc laser beam.