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Photonics_Guy

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Photonics_Guy

Re: prototype_101 post# 60457

Sunday, 12/06/2020 9:08:17 AM

Sunday, December 06, 2020 9:08:17 AM

Post# of 199235
Regarding the 'ring modulator' with the IC temperature control...

2) they are extremely temperature sensitive so they have to use electronic IC controlled heaters to compensate for temperature changes and fine tune and stabilize the resonant wavelengths



The heater/coolers are actually Peltier Thermo-Electric Coolers (TECs). Really handy technology that is also used to temperature stabilize the laser. However, TECs have a couple major drawbacks...they consume prodigious amounts of current and they are VERY inefficient. Efficiencies are around 10-15%.

I suspect the current required to power the TECs will exceed that of the RF Driver amplifiers.

The Ring Modulators sound to be - at best - a stop gap technology. They sound complex, inefficient and power hungry to me.

PG
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