Decreasing the index change of grating with trapezoid index modulation

Guo-Dong Wang; Cai-Xia Liu; Dong-Ming Sun; Wen-Bin Guo; Wei-You Chen

doi:10.1117/12.667077

28 January 2006 Decreasing the index change of grating with trapezoid index modulation

Guo-Dong Wang, Cai-Xia Liu, Dong-Ming Sun, Wen-Bin Guo, Wei-You Chen

Proceedings Volume 6025, ICO20: Optical Communication; 60251S (2006) https://doi.org/10.1117/12.667077
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

Trapezoid index modulation (TIM) is introduced in long period fiber grating to decrease the index change. The coupled-mode equations of long period grating with trapezoid index modulation have been presented. The coupled interactions considered in these equations include not only the self-coupling of the core mode and the coupling between the fundamental core mode and the cladding modes, but also the self-coupling of the cladding modes. Compared with the long-period fiber grating with rectangle index modulation (RIM), the advantage of this novel grating is that it needs a smaller refractive index change. The value of refractive index change decreases with the increasing of the difference between the top width and the bottom width. When the difference between the top width and the bottom width is 30 μm, the refractive index change is only 80.2% of that of the long-period fiber grating with rectangle index modulation. Trapezoid index modulation can also be applied to the fiber Bragg and sampled grating to decrease the refractive index change. Sixteen uniform channels filtering with small refractive index change are also demonstrated.

Citation Download Citation

Guo-Dong Wang, Cai-Xia Liu, Dong-Ming Sun, Wen-Bin Guo, and Wei-You Chen "Decreasing the index change of grating with trapezoid index modulation", Proc. SPIE 6025, ICO20: Optical Communication, 60251S (28 January 2006); https://doi.org/10.1117/12.667077

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available