Prof. Fang Niu Profile

Prof. Fang Niu

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 6 November 2023 Paper

Apodized fiber Bragg grating inscribed by femtosecond laser point-by-point method

Yunzhi Hua, Mingxiang Guan, Hanying Chen, Fang Niu, Yuhu Miao, Zhihao Cai, Meihua Chen, Cong Zhao, Changrui Liao

Proceedings Volume 12921, 129215K (2023) https://doi.org/10.1117/12.3008963

KEYWORDS: Femtosecond phenomena, Fiber Bragg gratings, Modulation, Apodization, Refractive index, Reflection, Fiber lasers, Fabrication, Reflection gratings, Femtosecond pulse shaping

Read Abstract +

Fiber Bragg Grating (FBG) is an important type of fiber devices, which has been widely applied in optical filtering, fiber laser, and fiber sensor networks. Due to its uniform Refractive Index (RI) modulation, the conventional FBG usually behaves with prominent sidelobes in the reflection spectrum. In this paper, we propose a simplified dual-path approach utilizing femtosecond laser point-by-point direct writing method, to fabricate apodized FBGs with both high reflectivity and side mode rejection ratio. We adjusted the area of the femtosecond laser applying on the fiber core to achieve different overlapping integrals in different areas using a dual-path approach. By linearly translating the laser focus on the fiber core through two symmetrical paths, two identical Gaussian apodization functions was introduced to fabricate apodized FBG in YOFC single-mode fiber with target wavelengths in the range 1520–1570 nm using focused 515 nm femtosecond laser pulses and a fiber-guiding system with sub-micrometer transverse control. Following such simplified fabrication method, a new apodized grating with both enhanced reflectivity (⪆90%) and side mode rejection ratio (⪆ 13 dB) has been achieved. Such improved spectral quality allows the fabricated FBGs to fulfill the requirements of the applications in optical communication and sensing systems.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years