| 摘要 |
An improved wavelength division multiplexing device (10) is disclosed. The improved wavelength division multiplexing device (10) monochromatic optical beams into a multiplexed, polychromatic optical beam. The improvement in the improved wavelength division multiplexo index collimating/focusing lens (16) for collimating the plurality of monochromatic optical beams (24) traveling along a first direction (24') to the diffraction grating (18), and for focusing the multiplexed, polychromatic optical beam (26) traveling along a second direction (26') from the diffraction grating (18) wherein the second direction (26') being substantially opposite the first direction (24').</SDO AB>
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