초록 ▼

A beam splitter/combiner module for multiplexing and/or demultiplexing a plurality of optical signals having at least three different wavelengths .lambda..sub.1, .lambda..sub.2, and .lambda..sub.3 traveling through the module. The module includes a first dichroic mirror having low loss transmission

A beam splitter/combiner module for multiplexing and/or demultiplexing a plurality of optical signals having at least three different wavelengths .lambda..sub.1, .lambda..sub.2, and .lambda..sub.3 traveling through the module. The module includes a first dichroic mirror having low loss transmission over a first preselected range of wavelengths including .lambda..sub.1 and .lambda..sub.2 so as to substantially transmit signals having wavelengths .lambda..sub.1 and .lambda..sub.2 through the first mirror and along an optical signal path of the module. The first dichroic mirror also has high reflectance over a second preselected range of wavelengths including .lambda..sub.3 so as to substantially reflect from the first mirror signals having wavelength .lambda..sub.3. A second dichroic mirror, disposed along the optical signal path for receiving from the first mirror the signals transmitted through the first mirror, has low loss transmission over a third preselected range of wavelengths including .lambda..sub.1 so as to substantially transmit signals having wavelength .lambda..sub.1 through the second dichroic mirror. The second dichroic mirror also has high reflectance over a third preselected range of wavelengths including .lambda..sub.2 so as to substantially reflect from the second mirror signals having wavelength .lambda..sub.2.

대표청구항 ▼

[ I claim:] [1.]1. A beam splitter/combiner module operatively connectable to an optical fiber end and for at least one of multiplexing and demultiplexing a plurality of optical signals having at least three different wavelengths .lambda..sub.1, .lambda..sub.2, and .lambda..sub.3 traveling through t

[ I claim:] [1.]1. A beam splitter/combiner module operatively connectable to an optical fiber end and for at least one of multiplexing and demultiplexing a plurality of optical signals having at least three different wavelengths .lambda..sub.1, .lambda..sub.2, and .lambda..sub.3 traveling through the module, comprising:a first dichroic mirror constructed for one of low loss transmission and high reflectance of wavelengths including .lambda..sub.1 and .lambda..sub.2, and for another one of low loss transmission and high reflectance of wavelength .lambda..sub.3 ;a first collimating lens disposed between the optical fiber end and said first dichroic mirror for training signals between the optical fiber end and said first dichroic mirror;a second collimating lens disposed for training a first portion of said plurality of signals which is reflected by said first dichroic mirror;a second dichroic mirror disposed along an optical signal path defined between said first and said second dichroic mirrors for communicating optical signals along said signal path between said first dichroic mirror and said second dichroic mirror, said second dichroic mirror constructed for low loss transmission of wavelength .lambda..sub.1 so as to substantially transmit the signal having wavelength .lambda..sub.1 through said second dichroic mirror, and for high reflectance of wavelength .lambda..sub.2 so as to substantially reflect the signal having wavelength .lambda..sub.2 ;a third collimating lens disposed for training a second portion of said plurality of signals reflected by said second dichroic mirror; anda fourth collimating lens disposed for training a third portion of said plurality of signals transmitted by said second dichroic mirror.