Photonic generation of microwave signal using a dual-wavelength single-longitudinal-mode fiber ring laser

A novel approach for the generation of high-frequency microwave signals using a dual-wavelength single-longitudinal-mode fiber ring laser is proposed and demonstrated. In the proposed configuration, a dual-wavelength fiber Bragg grating (FBG) with two ultranarrow transmission bands in combination with a regular FBG is used to ensure single-longitudinal-mode operation of the fiber ring laser. A semiconductor optical amplifier is employed as the gain medium in the ring cavity. Since the two lasing wavelengths share the same gain cavity, the relative phase fluctuations between the two wavelengths are low and can be used to generate a low-phase-noise microwave signal without need of a microwave reference source. Three dual-wavelength ultranarrow transmission-band FBGs with wavelength spacing of 0.148, 0.33, and 0.053 nm are respectively incorporated into the laser. Microwave signals at 18.68, 40.95, and 6.95 GHz are obtained by beating the dual wavelengths at a photodetector. The spectral width of the generated microwave signals as small as 80 kHz with a frequency stability better than 1 MHz in the free-running mode at room temperature is obtained.

[1]  Xiangfei Chen,et al.  Ultranarrow dual-transmission-band fiber Bragg grating filter and its application in a dual-wavelength single-longitudinal-mode fiber ring laser. , 2005, Optics letters.

[2]  Fei Zeng,et al.  Single-longitudinal-mode fiber ring laser employing an equivalent phase-shifted fiber Bragg grating , 2005 .

[3]  Chongcheng Fan,et al.  Equivalent phase shift in a fiber Bragg grating achieved by changing the sampling period , 2004 .

[4]  Fabien Bretenaker,et al.  Generation of tunable high-purity microwave and terahertz signals by two-frequency solid state lasers , 2004, SPIE Photonics Europe.

[5]  P. Shen,et al.  High-purity millimetre-wave photonic local oscillator generation and delivery , 2003, MWP 2003 Proceedings. International Topical Meeting on Microwave Photonics, 2003..

[6]  G. Alphonse,et al.  168 channels x 6 GHz from a multiwavelength mode-locked semiconductor laser , 2003, IEEE Photonics Technology Letters.

[7]  Mario Dagenais,et al.  Optical generation of a megahertz-linewidth microwave signal using semiconductor lasers and a discriminator-aided phase-locked loop , 1997 .

[8]  Martin Chamberland,et al.  Microwave signals generated by optical heterodyne between injection-locked semiconductor lasers , 1997 .

[9]  Shuji Matsuura,et al.  Generation of millimetre-wave radiation using a dual-longitudinal-mode microchip laser , 1996 .

[10]  J. O'Reilly,et al.  Remote delivery of video services using mm-waves and optics , 1994 .

[11]  J. O'Reilly,et al.  Optical generation of very narrow linewidth millimetre wave signals , 1992 .

[12]  Mario Dagenais,et al.  6-34 GHz offset phase-locking of Nd:YAG 1319 nm nonplanar ring lasers , 1989 .

[13]  H. Taylor,et al.  Microwave signal generation with injection-locked laser diodes , 1983 .