应用于数字和模拟光通信的高速电吸收光调制器

An electro-absorption （EA） modulator is one of key components for optical fiber communications due to the high speed, small size, low voltage and integration ability with other semiconductor devices. A 40 Gb/s InGaAsP/InP multiple-quantum-well （MQW） EA modulator monolithically integrated with a semiconductor optical amplifier （SOA） was fabricated for digital communications. The modulator capacitance was reduced to obtain 40 GHz bandwidth, and the SOA section helped reduce the insertion loss from 18 dB to 3 dB. InGaAlAs/InP MQW EA modulators have also been fabricated and characterized for analog optical fiber communications. A low driving voltage of 2.7 V and high spurious free dynamic range of 107 dB·Hz^2/3 were estimated by static and dynamic measurements.

High Speed Electro-Absorption Modulators for Digital and Analog Optical Fiber Communications

Electro-absorption (EA) modulators have been regarded as key components in optical fiber communications due to their advantages of high speed, small size, low voltage and integration ability with other semiconductor devices. For digital communications, with the development of wavelength division multiplexing (WDM) technology, the bit-rate of optical fiber communication systems keeps increasing. For analog optical fiber communications, low driving voltage and high linearity of EA modulators are more emphasized for higher spurious free dynamic range (SFDR) performance.