This paper draws attention to the basic principles governing reflections in uniform Bragg reflectors (BR) when measured employing optical low coherence reflectometry (OLCR) technique. Using computations based on transfermatrix method (TMM), we first showed a strong spectral dependence of Bragg reflectograms on an OLCR probe spectrum. Later, this dependence is exploited to evaluate, for the first time, the coupling coefficient κ of a Bragg grating in a distributed Bragg reflector (DBR) laser on InP.


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  1. U. Wiedmann, P. Gallion, Y. Jaouën and C. Chabran, "Analysis of distributed feedback lasers using optical low-coherence reflectometry", J. Lightwave Technol., vol. 16, pp. 864-869, May 1998.

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