Title :
Optical Frequency-Detuned Heterodyne for Self-Referenced Measurement of Photodetectors
Author :
Shangjian Zhang ; Heng Wang ; Xinhai Zou ; Yali Zhang ; Rongguo Lu ; Heping Li ; Yong Liu
Author_Institution :
State Key Lab. of Electron. Thin Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A self-referenced frequency response measurement of high-speed photodetectors (PDs) is proposed and demonstrated based on optical frequency-detuned heterodyne method. Our method provides a narrow linewidth and wide-bandwidth optical stimulus consisting of acoustooptic frequency shifting and two-tone phase modulation in a Mach-Zehnder interferometer, and achieves the self-referenced frequency response measurement of high-speed PDs without the need for correcting the power variation of optical stimulus. Moreover, it allows multiplied measuring frequency range and avoids any bias drifting problem. Frequency responses are experimentally measured for a commercial PD, which agree well with the results obtained by the conventional methods.
Keywords :
Mach-Zehnder interferometers; acousto-optical effects; heterodyne detection; optical modulation; phase modulation; photodetectors; Mach-Zehnder interferometer; acoustooptic frequency shifting; high-speed photodetectors; narrow linewidth optical stimulus; optical frequency-detuned heterodyne method; power variation; self-referenced frequency response measurement; two-tone phase modulation; wide-bandwidth optical stimulus; Frequency measurement; Frequency modulation; High-speed optical techniques; Optical interferometry; Optical mixing; Optical modulation; Optical variables measurement; Frequency response; microwave photonic signal processing; optical heterodyning; photodetectors;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2405253
