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We show the fabrication of a 90° optical hybrid front-end circuit by direct laser inscription. Excess loss of 1.4 dB with maximum phase error of 3.6 degrees were achieved using MMI-based devices and a novel 3-dimensional layout.
We report the first space-division-multiplexed based symmetric NG-PON2 network by efficiently transmitting 40 Gbit/s/spatial-mode. Error free transmission (BER of 10-9) is obtained for all the downstream and upstream data tributaries over 1-km 6-spatial-mode FMF without using MIMO DSP.
The use of ultrafast laser writing for fabricating advanced 3D waveguide components is presented and demonstrated. Couplers for space division multiplexing allowing beyond Shannon limit spectral efficiency, and 3D hybrid integration capabilities are discussed.
We present a 57 channel spatial multiplexer consisting of 19 separate 3-port photonic lanterns arranged in a hexagonal array. An average insertion loss of 0.92 dB was measured across all ports with 0.1 dB uniformity.
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