| 主权项 |
1. An optical transmitting apparatus comprising:
an optical fiber for propagation of optical beams, wherein the optical fiber has an optical axis; a first laser emitting section that emits a first laser beam having a first wavelength; a plurality of second laser emitting sections, wherein each second laser emitting section emits a respective second laser beam having a wavelength different from the first wavelength and different from the wavelengths emitted by other second laser emitting sections; and a plurality of wavelength filter sections, wherein
the wavelength filter sections are arranged, optically, in series,each second laser emitting section is associated with a corresponding one of the wavelength filter sections of the plurality of wavelength filter sections,the first laser beam is incident on a first wavelength filter section of the plurality of wavelength filter sections that are arranged in series and is emitted to a successive wavelength filter section of the plurality of wavelength filter sections that are arranged in series,each of the wavelength filter sections, after the first of the wavelength filter sections, receives a laser beam emitted from a preceding wavelength filter section, of the plurality of wavelength sections that are arranged in series, and the second laser beam of the second laser emitting section corresponding to the respective wavelength filter section, and emits a multiplexed beam obtained by multiplexing the laser beam emitted by the preceding wavelength filter section and the second laser beam emitted by the second laser emitting section corresponding to the respective wavelength filter section, andeach of the wavelength filter sections comprises
a prism that includes a front end face and a rear end face, wherein the front end face faces the rear end face, the second laser beam of the second laser emitting section corresponding to the respective wavelength filter section is incident on the front end face of the prism, the first laser beam is incident on the rear end face of the prism of the first wavelength filter section, and a respective one of the multiplexed beams is incident on the rear end face of the prism of the wavelength filter sections succeeding the first wavelength filter section, anda wavelength filter film that is located on the rear end face of the prism, that transmits the laser beam that is incident on the rear end face of the prism, that reflects the second laser beam that is incident on the front end face of the prism, and that multiplexes the laser beams that are incident on the rear end face and the front end face of the prism,the front end face and the rear end face of the prism are not parallel to each other so that a prism angle, which is an angle at which a surface parallel to the front end face intersects a surface parallel to the rear end face, is an acute angle, andthe prism angle is the angle at which the laser beam, incident on the front end face of the prism, is reflected by the wavelength filter film toward the front end face of the prism, and at which the multiplexed beam is directed toward the optical axis of the optical fiber. |
