Optical injection locking of a 38-GHz-band InP-based HEMT oscillator using a 1.55-μm DSB-SC modulated lightwave

Abstract

Optical injection locking was experimentally performed using a 38-GHz-band InP-based HEMT MMIC oscillator and a 1.55-m lightwave. Two optical modulation schemes were compared for optical injection locking, and no difference was found except for the optical modulation frequency. With suppressed carrier modulation of the lightwave, phase noise of less than 73.2 dBc/Hz at a 10-kHz frequency offset and a 14-MHz locking range were achieved.

The role of the AlGaAs doping level on the optical gain of two-dimensional electron gas photodetectors

“…The photocurrent is then given by (2) where g m is the transconductance of the device. Now, we write the relationship between the Fermi level position, E F , and the 2-DEG carrier concentration, n s , as 11 (3) where E i is the ith confined energy state.…”

Terahertz Time Domain Spectroscopy, T-Ray Imaging and Wireless Data Transfer Technologies

“…We have employed a double side band suppressed carrier (DSB-SC) method to generate 120 GHz, and an amplitude shift keying(ASK) method to modulate the 10 Gbps signal. The DSB-SC method is an optical heterodyne technique having a simple structure and easy access to a desired frequency signal [8]～ [10] .The 120 GHz continuous wave is generated by photomixing of the double side bands(DSBs) ±60 GHz apart from central frequency 194.1 THz (1,546.9 nm wavelength) with a uni-traveling photodiode (UTC-PD). Fig.…”