| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical device suppressing changes in a drive current and an optical output over time. SOLUTION: An optical amplifying element 20 on a stem 10 is called transmissive SOA and is adapted to amplify short-wavelength light incoming into an incidence side end face 20A to emit light having larger luminance than the incident light from an injection side end face 20B. Both the incidence side end face 20A and the injection side end face 20B of the optical amplifying element 20 have an antireflection film on the surface thereof. The optical amplifying element 20 is sealed by a stem 10 and a cap 30. Light transmission windows 32 are provided with the cap 30 in the opposite part of the incidence side end face 20A and the injection side end face 20B, respectively. COPYRIGHT: (C)2011,JPO&INPIT
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