Fiber to the home

It is fiber directly connected to the microchip in order to realize 128 Gbit/s/chip optically, the well known Fiber To The Home (FTTH) networking application.
Best related literature can also be found in the IEEE Journal of Lightwave Technology and IEEE Photonics Technology Letters under IEEE LEOS Society. 

In our LCOM_1 project, we are conducting research to realize low cost transmission system of 128 Gbit/s optically. In our prospective, to achieve this goal we need to make possible the Lateral Connection of Optical fibers to the Microchip, and the technique is described as follow.

The waveguides are deposed on the PGA ceramic package at the level of the n-well/substrate of the photoreceivers in the chip.  The internal metallization at a higher level ensures the electrical connection from the bonded pads to the pin-grid-array (PGA).  The 4 fiber ribbons are connected at the external sides of the chip and are guided by guide-pins and fixed to the ferrule connectors.  The ferrule connectors are fixed permanently during the ceramic processing. 

Si-chip of 5 x 5 mm² could contain a total capacity of 32 x 4 CMOS photoreceivers placed at the periphery to achieve a system of 128 channels x 1 Gbit/sec/ch.

We hold 50 samples of Si chips (1) (2) that are accordingly designed for this purpose. CMOS photoreceivers are well developed and seem to work at 1 GHz with blue laser light.  About 10 IEEE articles and a Ph.D. on the topic are published in different Journals, such as Photonics Technology Letters and Solid State Circuits.

We hold many CMOS photoreceivers of different active areas that are specified to receive the laser light pulses, as seen in this figure with the white spot. These photoreceivers are bounded separately and are used to perform experiments.

A system of 128 Gbits/sec monolithic is possible to realize, and this will make possible the direct connection of optical fiber to the personal computer, something still does not exist in nowadays.

Do we have fiber optic at home? We don't, because a hybrid system is difficult to realize.
 

In case you wish to invest in the project, please do not hesitate to contact us.
Other photos are here (1) (2) (3)

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