Title :
RF Frequency Response of Photoconductive Samplers
Author :
Roux, Jean-François ; Delord, Jean-Marie ; Coutaz, Jean-Louis
Author_Institution :
Lab. d´´Hyperfreq., Univ. de Savoie, Paris, France
Abstract :
We derive the microwave bandwidth of ultrafast optoelectronic samplers based on photoconducting switches, using a simple analytical model. The validity of this model is checked by measuring the bandwidth of semi-intrinsic and low-temperature-grown GaAs photoswitches. The bandwidth of such devices is limited by the response time of both the semiconductor material and the electrical circuit. The devices behave as low-pass filters exhibiting a -60 dB/decade slope.
Keywords :
III-V semiconductors; electro-optical switches; gallium arsenide; high-speed optical techniques; low-pass filters; microwave photonics; GaAs; RF frequency response; low-pass filters; microwave bandwidth; photoconducting switches; photoconductive samplers; photoswitches; ultrafast optoelectronic samplers; Bandwidth; Laser excitation; Optical pulses; Optical switches; Radio frequency; Resistance; Time factors; Frequency response of optoelectronic devices; low-temperature-grown GaAs; photoconductive devices; sampling methods;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2010.2077672
