Selective Photodiode with Modulated Sensibility 

Description:
The selective photodiode is made on the basis of In_xGa_1-xAs_yP_1-y multilayer heterostructure can be used for speeding up the information transmission for atmosphere and fiber telecommunication systems and for detecting simultaneously two or more optic signals with different wavelengths. The output signal amplitude is modulated at the 100 % by the inverse supply voltage of p-n junctions. The selective photodiode simultaneously receive two optic signals with different wavelengths and the photosensitivity for the both signals can be modulated by the supply voltage.

Innovative Aspect and Main Advantages:

• Speed up the information transmission for atmosphere and fiber telecommunications system
• Photosensibility modulation up to 100% by the applied voltage
• Detecting simultaneously two or more optic signals with different wavelengths
• Exclusion of optic background influence and detection of signals with certain wavelengths only

Areas of Application:
Atmosphere and fiber optic telecommunications systems

Stage of Development:

The prototype of the selective photodiode was tested in the Laboratory of Micro-Optoelectronics, Technical University of Moldova.

Covered by the patent of R. Moldova MD 886 G2

Fig.1. Structure of selective photodiodes series.


Fig.2 Current-voltage characteristic of selective photodiode.

Contact Details:
Technical University of Moldova
Contact persons:
Valerian DOROGAN, vice-rector
Sergiu ZAPOROJAN, department of scientific investigations
Address:
Republic of Moldova, Chisinau, 168, Stefan cel Mare Ave.
Tel/Fax:
+ (373 22) 23 54 37,
+ (373 22) 23 54 05
E-mail:
dorogan_lme@yahoo.com