| 摘要 |
PROBLEM TO BE SOLVED: To provide a polarization control element capable of efficiently reducing the influence of a thermal effect due to the increase of output of an incident light beam. SOLUTION: The polarization control element 1 is provided with: two opieces of Pockels cells 3a, 3b each of which comprises a medium 5 composed of electrooptical material having the Pockels effect and a pair of planar electrodes 6 joined to the surface of the medium 5 so as to hold the medium 5 therewith, and which are disposed in series along the incident direction of the incident light beam O<SB>in</SB>; and a 90°quartz rotator 4 which is disposed between the two Pockels cells 3a, 3b and rotates a polarizing surface of the incident light beam O<SB>in</SB>which propagates between the two pieces of Pockels cells 3a, 3b by 90°. COPYRIGHT: (C)2008,JPO&INPIT
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