Glass chip couples to optical fibres to silicon photonics


OptoCplrLT with fiber assembly, coupling to SiPh grating couplers

Branded OptoCplrLT, the devices are monolithic glass light-turning curved mirrors, which direct light to or from silicon-photonic grating couplers.

“This prevents the need for bend-tolerant fibre solutions which have some significant limitations in size and profile,” according to the company.

Optoscribe OptoCplrLT diagramMade using a proprietary laser writing technique, the couplers are around 1.5mm high including cap (~1mm without) and are compatible with industry-standard materials and processes, said Optoscribe: for example the glass chip has a coefficient of thermal expansion matched to the silicon chip (see table below).

“We are pleased to announce that we are sampling OptoCplrLT, which offers data centre operators, transceiver manufacturers and optical component suppliers a solution to help address fibre-to-silicon photonics IC coupling challenges and help overcome silicon photonics transceiver packaging and integration hurdles,” said company CEO Russell Childs.

Parameter Value Notes
Operating wavelength 1280-1625nm
Insertion loss assembled <0.5dB
Number of channels  2, 4, 8 Other channel counts optional
Channel pitch 250μm Other channel pitches optional
Optical output angle 8° to normal Other angles optional
Working distance of focal plane 24μm Working distances 0-30μm+ optional
height ~1mm ~1.5mm with cap
Glass substrate BF33 3.25 ppm/K
Fibre type G657.A1 / G652

The OptoCplrLT product page is here

Optoscribe is based in Livingston Scotland, where its manufacturing cleanroom is located. Its product portfolio includes fibre alignment arrays, fibre-to-fibre interconnects, multi-core fibre fan-outs, photonic lanterns, transceiver photonic integration platforms, silicon photonics couplers and other optical sub-assemblies.





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