Mass preparation of photosensitive fibers and 248-nm excimer writing of fiber gratings by use of a pi/2 phase shift mask

K. Roger Lee; Steve Lin; Chia-Tse Sun

doi:10.1117/12.312853

19 June 1998 Mass preparation of photosensitive fibers and 248-nm excimer writing of fiber gratings by use of a π/2 phase shift mask

K. Roger Lee, Steve Lin, Chia-Tse Sun

Author Affiliations +

Proceedings Volume 3420, Optical Fiber Communication; (1998) https://doi.org/10.1117/12.312853
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

Abstract

Hundreds of photosensitive fibers have been prepared by the procedure of hydrogen loading in SMF-28 fibers and exposed to the UV lamp. This process can temporarily prevent hydrogen in fibers from outgas and maintain the photosensitivity for 4-5 days. It has been observed that hydrogen will diffuse out the core of fibers within several hours if fiber prepared by hydrogen loading is not exposed to excimer or UV radiation immediately. Such preparation is convenient for mass production of fiber gratings. The photosensitivity of fibers is judged according to the maximum reflectivity of fiber gratings written by 248nm excimer laser and OH-ion absorption at 1380nm wavelength. We also conclude that forming Bragg gratings in fibers of above preparation by use of a (pi) /2 phase shift mask, where the diffraction intensity ratio of plus/minus first order to zero order is 45-55 percent, can reach above 30dB in reflectivity. Notably, the periodic modulation of refractive index in fiber Bragg grating is permanent after the verification of thermal aging test for 60 days.

Citation Download Citation

K. Roger Lee, Steve Lin, and Chia-Tse Sun "Mass preparation of photosensitive fibers and 248-nm excimer writing of fiber gratings by use of a π/2 phase shift mask", Proc. SPIE 3420, Optical Fiber Communication, (19 June 1998); https://doi.org/10.1117/12.312853

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