Title :
Experimental results for a CW-mode optically controlled microwave switch with a carrier-confinement structure
Author :
Sangil Lee ; Kuga, Y. ; Mullen, R.A.
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
A new design for a CW-mode optically controlled microwave switch (CW-mode OMS) on a semiconductor coplanar waveguide (CPW) is investigated, which is based on a silicon (Si) substrate etching for both top and bottom to confine the optically generated free-carriers. We fabricate the CW-mode OMS with and without carrier-confinement structures using a micro-fabrication technique, and the insertion loss is measured and compared. With the new carrier-confined CW-mode OMS, we are able to obtain less than 2 dB of insertion loss which is an improvement of more than 5 dB from without the carrier-confinement structure. Also, more than 20 dB of the ON/OFF difference is obtained up to 20 GHz.
Keywords :
coplanar waveguide components; etching; losses; microwave photonics; microwave switches; optical control; photoconducting switches; silicon; 2 dB; 20 GHz; CW-mode optically controlled switch; Si; Si substrate etching; carrier-confinement structures; insertion loss; microfabrication technique; optically controlled microwave switch; semiconductor CPW; semiconductor coplanar waveguide; Coplanar waveguides; Insertion loss; Optical control; Optical design; Optical losses; Optical switches; Optical waveguides; Semiconductor waveguides; Silicon; Substrates;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011902
