| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a single-core bidirectional optical module of one-package type, capable of reducing optical crosstalk without being affected by incident angle and characteristics of a WDN filter. <P>SOLUTION: In the single-core bidirectional optical module of one-package type, a cap 11 having a translucent window is sealed on a stem 2 where a light-emitting element 4 for emitting transmission light, a light-receiving element 6 for receiving reception light, and a wavelength multiplexing/demultiplexing filter 8 are mounted. The light-emitting element 4 is mounted on the stem 11 through a heatsink 5, and the light-receiving element 6 is mounted through a sub-mount 7 such that a range in which outgoing light from the light-emitting element 4 penetrates a light-receiving surface 6a of the light-receiving element 6 is shielded by the heatsink 5. Between the wavelength multiplexing/demultiplexing filter 8 and the light-receiving element 6, a cut filter 9 is arranged for absorbing the wavelength light other than the reception wavelength light, and the heatsink 5 is composed of materials not allowing transmission wavelength light to penetrate therethrough. <P>COPYRIGHT: (C)2010,JPO&INPIT |
