DocumentCode
1452860
Title
Phase tuning by laser ablation of LiNbO/sub 3/ interferometric modulators to optimum linearity
Author
Bulmer, C.H. ; Burns, W.K. ; Greenblatt, A.S.
Author_Institution
US Naval Res. Lab., Washington, DC, USA
Volume
3
Issue
6
fYear
1991
fDate
6/1/1991 12:00:00 AM
Firstpage
510
Lastpage
512
Abstract
Fast, accurate phase bias trimming of LiNbO/sub 3/ interferometric modulators by excimer laser ablation is reported. Phase angle measurements and correction were performed in situ on a previously fabricated, packaged modulator. Any angle can be precisely adjusted to 90 degrees (maximum linearity). Single-laser-pulse exposures on one interferometer arm caused changes in angle of 0.8-8 degrees , depending on laser fluence and the depth of the material removed.<>
Keywords
laser beam effects; light interferometers; lithium compounds; optical modulation; LiNbO/sub 3/ interferometric modulators; Mach-Zehnder interferometer; depth; excimer laser ablation; fabricated packaged modulator; interferometer arm; laser fluence; phase angle measurements; phase bias trimming; phase tuning; single laser pulse exposures; Goniometers; Laser ablation; Laser transitions; Laser tuning; Linearity; Optical materials; Packaging; Performance evaluation; Phase measurement; Phase modulation;
fLanguage
English
Journal_Title
Photonics Technology Letters, IEEE
Publisher
ieee
ISSN
1041-1135
Type
jour
DOI
10.1109/68.91017
Filename
91017
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