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Appl Opt. 1996 Sep 1;35(25):5162-4. doi: 10.1364/AO.35.005162.

Distributed measurement of the complex modulation of a photoinduced Bragg grating in an optical fiber.


A method of measuring the complex modulation of a Bragg grating is derived from a one-dimensional model of light propagating in an optical fiber. Interference fringes between the Bragg grating and a reference air-gap reflector are measured, and a Fourier transform of the interference fringes generated as a laser is swept through the wavelength is used to compute the complex modulation function of the Bragg grating over a restricted domain. Supporting data, taken by temperature tuning a distributed feedback diode laser, are shown.

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