| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an autocorrelator which is not influenced by environment of measurement and which does not require adjustment of an optical system. <P>SOLUTION: The autocorrelator is constructed by forming an input waveguide 12a to input pulsed light A to be measured, a directional coupler 13 to make the pulsed light branch, two waveguides 14a, 14b to propagate the pulsed light branched and heaters 15a, 15b to heat the waveguides 14a, 14b so as to make the refractive indexes vary on a substrate 11, arranging a nonlinear optical crystal 16b on a point where outputted light beams A1, A2 from the waveguides 14a, 14b intersect and having a wavelength filter 17 to transmit second harmonic light B generated from the nonlinear optical crystal 16b and a photodiode 18 to detect the transmitted second harmonic light B. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
