The Use of a Fiber Comb Filter Fabricated by a CO$_{2}$ Laser Irradiation to Improve the Resolution of a Ratiometric Wavelength Measurement System

An edge filter-based ratiometric wavelength measurement system is modeled and analyzed in this paper. The results confirm that the noise of input signal and photodetectors limits the resolution of the wavelength measurement system. The achievable resolution is calculated for a given noise level of the input signal and photodetectors' resolution. An improved ratiometric wavelength measurement system consisting of two fiber comb filters is presented both theoretically and experimentally, which performs coarse and fine wavelength measurements simultaneously. The resolution of the system is significantly improved to better than 5 pm while maintaining the potential for high measurement speed and wide measurable wavelength range.

[1]  H. Choi,et al.  All-fiber Mach-Zehnder type interferometers formed in photonic crystal fiber. , 2007, Optics express.

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

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

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

[5]  K. Sooley,et al.  Tapered fiber Mach–Zehnder interferometer for simultaneous measurement of refractive index and temperature , 2009 .

[6]  John P. Dakin,et al.  Modeling and performance analysis of a fiber Bragg grating interrogation system using an acousto-optic tunable filter , 1996 .

[7]  Y. Semenova,et al.  Misalignment Limits for a Singlemode–Multimode–Singlemode Fiber-Based Edge Filter , 2009, Journal of Lightwave Technology.

[8]  Seung-Tak Lee,et al.  Low-cost bidirectional optical amplifier using a unidirectional Er-doped fiber amplifier and a fiber Mach-Zehnder interferometer , 2001, IEEE Photonics Technology Letters.

[9]  M. E. Cox.  Handbook of Optics , 1980 .

[10]  Aaas News,et al.  Book Reviews , 1893, Buffalo Medical and Surgical Journal.

[11]  Qian Wang,et al.  Resolution investigation of a ratiometric wavelength measurement system. , 2007, Applied optics.

[12]  Qian Wang,et al.  An Optimized Macrobending-Fiber-Based Edge Filter , 2007, IEEE Photonics Technology Letters.

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

[14]  Kevin Barraclough,et al.  I and i , 2001, BMJ : British Medical Journal.

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

[16]  Neil Genzlinger.  A. and Q , 2006 .

[17]  Yuliya Semenova,et al.  Generalized design process for fiber-bend-loss-based edge filters for a wavelength measurement system. , 2009, Applied optics.

[18]  Tao Wei,et al.  Fiber Inline Core–Cladding-Mode Mach–Zehnder Interferometer Fabricated by Two-Point CO$_{2}$ Laser Irradiations , 2009, IEEE Photonics Technology Letters.