Volume Holographic Grating Diplexer

volume holographic grating diplexer

ø 25.4 mm

volume holographic grating diplexer

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A Volume Holographic Grating Diplexer (VHGD) is an optical element that diffracts the downstream 1490nm signal while allowing the 1310nm upstream signal to go through.
Compared to thin film interference filter, the VHGD enables the 1310nm transmitter laser (TX) and the receiver (RX) to be on the same side, either on the same plane or at different heights, thus enabling low cost packaging.

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