Patent ID: 7680374
Filing Date: 2010-03-16
Classification: G02B

Abstract:
1. An apodised Bragg grating comprising: a base grating section having a base order periodic pattern of marks and spaces, and an apodised grating section adjacent to the base grating section; wherein the base order pattern of marks and spaces continues from the base grating section into the apodised grating section, and wherein the base order pattern within the apodised grating section is configured as modulated by a periodic envelope function which is higher order than the base order so that some of the marks of the base order pattern are missing in a periodically repeating manner, the apodised grating section having a configuration of the pattern of marks and spaces defined as “x/m”, where “m” is the order of the envelope function and “x” is the number of marks of the base order pattern remaining per period of the envelope function.