NDLI: A novel inspection of fiber post-weld-shift in butterfly laser module packaging

Content Provider	IEEE Xplore Digital Library
Author	Yih-Tun Tseng Hsin-Chin Sung
Copyright Year	1999
Abstract	Butterfly packaging technology with a fiber pigtail is widely used in packaging optical modules, and laser welding is used to join components in a butterfly package. During laser welding, the rapid solidification of the welded region and the associated shrinkage of material are expected cause relative movement between prealigned components. Such a post-weld-shift (PWS) might significantly reduce the efficiency of light coupling. The laser hammer technique can be used to realign fiber that shifts during laser welding, and it requires that the fiber shift be measured in three directions. Measuring the shift along the Y axis is difficult because space is limited. In this paper, a reflector placed near the fiber during laser welding was used to determine the shift along the Y-axis. The fiber images obtained using the charge-coupled device (CCD) camera were sometimes deformed, so digital image processing was used to calibrate the deformed images and calculate the fiber shift along three axes. The experimental results indicate that the fiber shift along the Y-axis, when captured using reflector inspection could be measured precisely, and more strongly influenced power coupling loss than shifts in the other two directions. The results are useful in implementing the realignment method after butterfly packaging.
Sponsorship	IEEE Components, Packaging, and Manufacturing Technology Society IEEE Components, Packaging and Manufacturing Technology Society
Starting Page	713
Ending Page	719
Page Count	7
File Size	1934453
File Format	PDF
ISSN	15213323
Volume Number	28
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-11-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inspection Fiber lasers Packaging Welding Optical fiber devices Optical devices Solid lasers Optical materials Optical coupling Extraterrestrial measurements post-weld-shift (PWS) Butterfly package fiber alignment shift mirror inspection
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in