Dear Abdurrahman,
thanks for posting this interesting question.
Agilent has a broad offering of T&M instruments that are used in many Si-Photonics labs worldwide.
(However, no Simulation SW yet).
As there are many different research topics in the Area of Si-Photonics (like coupling & interfaces, waveguides, Si based optoelectric
components
Tx, Rx, modulators, optical routing etc.) it is difficult to give a general advice here.
Products that are often used in this context are: Lightwave Component Analyzers, Tunable Laser sources, Poarization control equipment
and our Multiport Powermeters.
If you want to enter in a more specific discussion, my colleagues and myself would be glad to answer any question that you might have.
For a general overview, you might want to check out our Lightwave Catalog (
http://www.home.agilent.com/agilent/product.jspx?nid=-536900132.0.00&pageMode=LB&t=79832.g.1&co=152778.i.2&cc=US&lc=eng&sm=g).
Best regards
Andreas