Opto-couplers in smps - part 3 (final chapter)

Hi once again,

I've find an optocoupler called TCET 1102 G.
According to its data***, this coupler has an Fc of 110kHz.
Data***: http://www.dzsc.com/pdf_down.asp?id=642422
Will this mean I may use it in my smps loop which has a unity gain
frequency of 3kHz.

Regards

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