Title :
Photonic Generation of Sub-Terahertz Noises and Its Application to Spectroscopy Measurement
Author :
Ho-Jin Song ; Shimizu, N. ; Furuta, Takehiro ; Wakatsuki, A. ; Nagatuma, Tadao
Author_Institution :
NTT Microsyst. Integration Labs., NTT Corp., Atsugi
Abstract :
We present a photonic technique for generating sub-terahertz noise with an optical amplifier, arrayed waveguide grating (AWG), and uni-travelling carrier photodiode (UTC-PD). This scheme provides a high noise level and good controllability of the noise level and frequency band. The power density of the generated sub-terahertz noise is approximately -130.1 dBm/Hz at 350 GHz, which is 43.9 dB higher than the thermal noise (-174 dBm/Hz). Utilizing the implemented sub-terahertz noise generator with an UTC-PD module, we measured the absorption lines of N2O in the frequency range approximately 280~390 GHz and compared them with simulations.
Keywords :
arrayed waveguide gratings; nitrogen compounds; optical fibre amplifiers; optical noise; photodiodes; AWG; N2O; absorption lines; arrayed waveguide grating; frequency 280 GHz to 390 GHz; noise level; optical amplifier; photonic generation; power density; spectroscopy measurement; subterahertz noises; thermal noise; unitravelling carrier photodiode; Arrayed waveguide gratings; Frequency; Noise generators; Noise level; Noise measurement; Optical arrays; Optical noise; Optical waveguides; Spectroscopy; Stimulated emission;
Conference_Titel :
Microwave Conference, 2008. EuMC 2008. 38th European
Conference_Location :
Amsterdam
Print_ISBN :
978-2-87487-006-4
DOI :
10.1109/EUMC.2008.4751466
