| 摘要 |
<p>A two-channel optical fiber fused coupler comprising two optical fibers, each with a core and cladding, fused together at a narrow tapered waist. The first channel is at a wavelength of lambda 1 and the second channel is at a wavelength of lambda 2 where lambda 2 is longer than lambda 1. The coupler is fabricated to have a characteristic wavelength lambda 0 such that for wavelengths lambda 2 longer than lambda 0 coupling occurs and for wavelenghts lambda 1 shorter that lambda 0 the light at lambda 1 is core guided throughout the coupler and thus does not couple across.</p> |
