| 摘要 |
PURPOSE:To decrease the number of components, and to reduce the man-days of assembly, cost, and size by fixing optical fibers to one end of a lens in one body and arranging a polarization separating element at the other end, and further arranging a reflector, optical filter, and reflector on the optical path behind polarization separation. CONSTITUTION:Respective optical components are all adhered with a transparent optical adhesive, and light of wavelength lambda1 incident from, for example, a transmission line fiber 24 is made into parallel light by a lens 27; and the S-polarized component is reflected by the polarization separating element 30 and reflected again by a mirror 31 to couple with a transmissioi line fiber 23. Similarly, light of wavelength lambda2 from the fiber 23 couples with the fiber 24. Light of wavelength lambda2 incident from the fiber 23 is passed through the lens 27 and polarization separating element 30 and reflected by a dielectric multilayered filter 32 to couple with an output fiber. Similarly, light of wavelength lambda2 from a fiber 25 couples with the fiber 24 through a similar route. |
