Saturday, October 05, 2019 8:33:42 AM
PG, what's the difference to these Modulator Drivers that are priced at a tiny fraction of that benchtop Modulator Driver you linked
https://www.analog.com/en/products/optical/fiber-optic-data/modulator-drivers.html#
I know the concept of a Driverless Modulator definitely is attractive to Tier 1's as cost reducing, but I thought PIC complete Transceivers were priced much cheaper than that Driver you linked.
The picture below is from the datasheet of the most expensive Driver IC from Analog Devices. That device supports data rates up to 22.5G, far less than 100G. As I mentioned earlier, getting a truly wideband amplifier (70-80GHz) of input RF Bandwidth is much more challenging than 12-15GHz. Also, this is only one component (albeit the most important one). There are no voltage regulators, DACs, ADCs, uControllers, impedance matched printed circuit board, etc., to handle the other functions that are needed in a typical Driver.
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