Title :
Enhanced Performance of Narrowband Millimeter-Wave Generation Using Shaped-Pulse-Excited Photonic Transmitters
Author :
Lin, Jim-Wein ; Chuang, H.-P. ; Kuo, F.-M. ; Lin, Cheng-Han ; Liu, Tze-An ; Shi, Jin-Wei ; Huang, Chen-Bin ; Pan, Ci-Ling
Author_Institution :
Dept. of Phys., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
7/1/2011 12:00:00 AM
Abstract :
We demonstrate a novel method to greatly enhance the narrowband millimeter-wave (MMW) power generation by use of a near-ballistic uni-traveling-carrier photodiode-based photonic transmitter (PT) excited by shaped optical pulses. The spectrum of the best tailored optical pulses is centered at 1545 nm and spread among 16 main frequency components (channels), each with a spectral width of 15.5 GHz and a spacing of 93 GHz. Compared with quasi-sinusoidal optical modulation, we achieve an enhancement in the spectral power density by ~25 times. The power-enhanced narrowband MMW signal can be tuned over ~80 GHz (60-142 GHz). In addition, we observe significant enhancement of MMW peak power with an increase of the reverse bias voltage.
Keywords :
optical modulation; optical pulse generation; optical transmitters; MMW peak power; MMW signal; frequency 15.5 GHz; frequency 60 GHz to 140 GHz; frequency 80 GHz; frequency 93 GHz; frequency components; narrowband millimeter wave generation; near-ballistic uni-traveling-carrier photodiode; quasi-sinusoidal optical modulation; reverse bias voltage; shaped optical pulses; shaped-pulse-excited photonic transmitters; spectral power density; spectral width; wavelength 1545 nm; Optical pulse shaping; Optical pulses; Optical saturation; Optical transmitters; Photoconductivity; Photonics; Ultrafast optics; Millimeter wave (MMW); photonic transmitter (PT); pulse shaping; terahertz (THz);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2142301
