Title :
High frequency signal generation for fibre-radio applications based on a novel fibre laser structure
Author :
Lai, Yicheng ; Zhang, W. ; Williams, J.A.R.
Author_Institution :
Photonics Res. Group, Aston Univ., Birmingham, UK
Abstract :
Optical generation of a millimetre wave signal based on a co-located, dual distributed feedback fibre laser structure is proposed and demonstrated. Through the use of high birefringence fibre grating for polarization-discriminating self-injection feedback, the fibre laser produces stable dual polarization mode operation. Due to high common-mode suppression of phase noise, a millimetre wave beat signal of high spectral purity is obtained. Experimental result illustrates a heterodyne signal measured at ∼32.5 GHz with a linewidth of <1 kHz. No other complex feedback mechanism or high frequency synthesizer is required, and the beat frequency achievable in this all-fibre device is determined by the grating parameters only.
Keywords :
diffraction gratings; distributed feedback lasers; fibre lasers; microwave photonics; millimetre wave generation; optical communication equipment; optical fibre networks; phase noise; signal generators; 32.5 GHz; common-mode suppression; dual distributed feedback laser; fibre laser structure; fibre-radio applications; grating parameters; heterodyne signal; high birefringence fibre grating; high frequency signal generation; linewidth; millimetre wave signal; phase noise; polarization-discriminating self-injection feedback; Distributed feedback devices; Fiber lasers; Frequency; Gratings; Laser feedback; Laser modes; Laser noise; Optical feedback; Optical fiber polarization; Signal generators;
Conference_Titel :
High Frequency Postgraduate Student Colloquium, 2002.7th IEEE
Print_ISBN :
0-7803-7618-8
DOI :
10.1109/HFPSC.2002.1088432
