Compact optics assembly for a QKD station

Details Compact optics assembly for a QKD station Compact optics assembly for a QKD station

2007-05-22

2007-05-22

Connelly-Cushwa, Michelle (Department: 2874)

Optical waveguides

Polarization without modulation

C359S301000, C359S490020

Reexamination Certificate

active

11052373

ABSTRACT:
A bulk-optics assembly for a transmitting/receiving QKD station (BOB1) in a two-way autocompensating QKD system (101) is disclosed. The assembly consists of a first beamsplitter (104) having a high (e.g., 90:10) beamsplitting ratio, a 50:50 beamsplitter (106) and a polarizing beamsplitter (108). The assembly also optionally includes a polarizer (102), and/or a fixed attenuator (FOA), and/or an optional blocking filter (110) downstream of the polarizing beamsplitter. The compact bulk-optics assembly is easier to manufacture than a fiber-based optical system, and is simpler and more compact than prior art bulk-optics assemblies for QKD systems.

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