Beijing SWT Optical Communication Technology Co., Ltd. developed high linearity analog InGaAs opto-electronic photodiode chip according to the requirement of high performance CATV receivers and Triplexer. The chip possesses unique structure design and technics control, C<0.25Pf, ID <0.1nA, can meet the requirement of high-speed, high-linearity and high receiving sensitivity. In the meantime, SWT produced high linearity analog TO encapsulated with this kind chip and optical fiber coupling series products. The IMD2 of the products could reach ?80dBc(measurement conditions: f1=400MHz, P1=?3dBm; f2=450.25MHz, P2=?3dBm; f1+f2=850.25MHz, VR=12V, MI=40%, Pavg=0dBm, Rload=50O),and has passed the 12 reliable experiments of BELLCORE. The indexes of the products could compare with that of the products from Japan and USA, this kind product change the complexion that domestic top analog components relying on imports, and it is beneficial to the cost reduction and application of homemade products to the FTTH. At present SWT’s high linearity analog photodiode has been used on the Triplexer and high performance CATV receivers by a great deal known manufacturers and many European, American and Japanese clients.

     Beijing SWT Optical Communication Technology Co., Ltd., is a optical component company, with its main products LiNbO₃ Modulator, Opto-electronic Photodiode and Optical Module. SWT is a Sino-US joint venture, founded in April 2001. in 2001SWT invested more than 100 million RMB in the Yanjiao Economic Technological Development Zone in eastern Beijing, establishing the first production line of LiNbO₃ Modulator production line and