Iterative and Noniterative Design Algorithms for Bragg Gratings

✍ Scribed by L. Poladian

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 73 KB
• Volume: 5
• Category: Article
• ISSN: 1068-5200
• DOI: 10.1006/ofte.1998.0295

✦ Synopsis

Advances in fabrication have increased interest in techniques to design gratings with specific properties. Various techniques to design gratings with specified reflection characteristics already exist. The relative advantages and Ž . disadvantages of two different iterative vs noniterative classes of design algorithms are compared qualitatively and quantitatively. Iterative algorithms are quite general and robust, but are slow and inefficient for strong gratings. Noniterative algorithms are extremely accurate and efficient but can only be applied to a restricted class of gratings. Existing iterative techniques also have the disadvantage that they give a more accurate representation at the front of the grating, and the accuracy decreases rapidly along the length of the grating. New design techniques are presented that overcome some of these existing disadvantages by using information about the reflection characteristics from both ends of the grating and also using the transmission characteristics.