论文信息 - EFFECT OF SNR OF INPUT SIGNAL ON THE ACCURACY OF A RATIOMETRIC WAVELENGTH MEASUREMENT SYSTEM

EFFECT OF SNR OF INPUT SIGNAL ON THE ACCURACY OF A RATIOMETRIC WAVELENGTH MEASUREMENT SYSTEM

The impact of a change in signal-to-noise ratio (SNR) of the input signal on the accuracy of a ratiometric wavelength measure- ment system is studied. The variation of the output ratio of the system due to the change in SNR of the input signal is modeled and the experi- mental investigation has been carried out, and both indicate that the accuracy is influenced significantly by variations in the SNR of the input signal. The demonstration example shows a wavelength shift of 0.055 nm when the SNR of the input signal varies from 47 dB to 42 dB (the measurable range is from 1500 nm to 1600 nm and the edge filter used has a slope of 0.15 dB/nm). © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1022-1024, 2007; Published online in Wiley Inter-

[1] Gerald Farrell,et al. Study of transmission response of edge filters employed in wavelength measurements. , 2005, Applied optics.

[2] Alan D. Kersey,et al. All-fibre Bragg grating strain-sensor demodulation technique using a wavelength division coupler , 1994 .

[3] Qian Wang,et al. Low-cost wavelength measurement based on a macrobending single-mode fiber. , 2006, Optics letters.

[4] Jose Luis Santos,et al. All-fibre interrogation technique for fibre Bragg sensors using a biconical fibre filter , 1996 .

[5] Lin Zhang,et al. Fabricating fibre edge filters with arbitrary spectral response based on tilted chirped grating structures , 1999 .

[6] L. Coldren,et al. Tunable sampled-grating DBR lasers with integrated wavelength monitors , 1998, IEEE Photonics Technology Letters.

[7] R. Measures,et al. A passive wavelength demodulation system for guided-wave Bragg grating sensors , 1992, IEEE Photonics Technology Letters.