| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a small sized magneto-optical type optical attenuator having a small loss. SOLUTION: The attenuator is provided with a waveguide core part formed on a quartz substrate, a thin film type magnetic circuit part formed on the quartz substrate, and a Faraday rotor part formed in a part of the waveguide core part.</p> |
