Device for concatenation of phase-shifted long-period grating and its application as gain-flattening fiber filter

Yinian Zhu; Pieter L. Swart; Beatrys M. Lacquet; Ping Shum; Chao Lu; Stephanus J. Spammer

doi:10.1117/1.1564105

1 May 2003 Device for concatenation of phase-shifted long-period grating and its application as gain-flattening fiber filter

Yinian Zhu, Pieter L. Swart, Beatrys M. Lacquet, Ping Shum, Chao Lu, Stephanus J. Spammer

Author Affiliations +

Optical Engineering, Vol. 42, Issue 5, (May 2003). https://doi.org/10.1117/1.1564105

The transmission characteristics of phase-shifted long-period gratings (LPGs) are simulated theoretically using coupled-mode theory and the fundamental-matrix method. A phase-shifted LPG device cascaded with another uniform LPG can be used to flatten the gain spectrum of an erbium-doped fiber amplifier (EDFA) with three gain peaks. The results of all simulations have shown that a broadband amplifier with a 0.7-dB peak-to-peak gain variation over 36 nm can be realized practically. Using our designed and fabricated device, the experimental results show that the 3-dB bandwidth of the flattened EDFA is increased from 18 to 46 nm for an unequalized spectrum. The gain ripple over that bandwidth is reduced to approximately 0.9 dB. The improvement by a factor of 2 to 3 is realized in the sprectral performance. Such a gain-flattening fiber filter is indeed plausible and has a practical application in dense wavelength-division multiplexed (DWDM) telecommunication systems.

©(2003) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Yinian Zhu, Pieter L. Swart, Beatrys M. Lacquet, Ping Shum, Chao Lu, and Stephanus J. Spammer "Device for concatenation of phase-shifted long-period grating and its application as gain-flattening fiber filter," Optical Engineering 42(5), (1 May 2003). https://doi.org/10.1117/1.1564105

Published: 1 May 2003

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