Dithering phase locked technique analysis in photonic lantern

Haolong Wu; Zongfu Jiang; Wenguang Liu; Baolai Yang; Yanxing Ma; Kun Xie; Yao Lu

doi:10.1117/12.2505620

12 December 2018 Dithering phase locked technique analysis in photonic lantern

Haolong Wu, Zongfu Jiang, Wenguang Liu, Baolai Yang, Yanxing Ma, Kun Xie, Yao Lu

Proceedings Volume 10844, Advanced Laser Technology and Applications; 1084414 (2018) https://doi.org/10.1117/12.2505620
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

Abstract

We have made simulations for a 3*1 photonic lantern and the latter experiments were carried out to test characters of the lantern we designed. The three core lantern with 0.004 rad taper angle has a 15 mm taper length which begins with a 125 μm outer diameter and ends with a 10.4 μm outer diameter(core diameter to outer diameter ratio is 2/25), while the NA of single mode fiber is 0.08 and for 25/400 μm core/cladding diameter few mode fiber it is 0.1. In order to obtain preferable LP₀₁ mode shape, we used a phase control system to lock the phase of each channel staying consistent. The consequence demonstrated that the whole phase distribution of single mode fibers was controlled to an extent. Compared to amplitude, photonic lantern is more sensitive to phase fluctuation. We made simulations using Rsoft to test different variables of light propagating in 3*1 photonic lantern, and the results were in agreement with the conclusion. Thus, coherent beam combination based on dithering phase locked technique was studied systematically and we applied it to 3*1 photonic lantern. As a result, the beam received by light spot analyzer showed a stable mode shape but still existing some differences compared to expected LP₀₁ mode or LP₁₁ mode, which put forward reflection about the basic theory inside photonic lanterns (the beam propagating through tapered region didn’t make sense if using coherent beam combination calculation). At last, we attempted to explore the beam propagation through the lantern and to give any better evaluation function in phase control algorithm so as to improve the phase locked process.

Citation Download Citation

Haolong Wu, Zongfu Jiang, Wenguang Liu, Baolai Yang, Yanxing Ma, Kun Xie, and Yao Lu "Dithering phase locked technique analysis in photonic lantern", Proc. SPIE 10844, Advanced Laser Technology and Applications, 1084414 (12 December 2018); https://doi.org/10.1117/12.2505620

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
17 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Single mode fibers

Mode locking

Multimode fibers

Photon polarization

Photodetectors

Polarization

Signal processing

Show All Keywords

Keywords/Phrases

Search In:

Publication Years