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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of exterior acoustic noise on narrow linewidth laser measurements using self-homodyne optical fiber interferometer

Full text
Author(s):
Galdieri, Flavio J. [1] ; Sutili, Tiago [1] ; Melnikoff, Nikolai [1] ; Bordonalli, Aldario C. [1] ; Conforti, Evandro [1]
Total Authors: 5
Affiliation:
[1] Univ Campinas UNICAMP, Sch Elect & Comp Engn FEEC, Dept Commun DECOM, Opt Commun & Microwave Res Lab LAPCOM, Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: OPTIK; v. 204, FEB 2020.
Web of Science Citations: 0
Abstract

Spectral linewidth measurements of a HeNe laser were obtained by using a self-homodyne optical fiber Mach-Zehnder interferometer located in a vacuum controlled chamber. The data showed an apparent broadening of the highly-coherent laser linewidth from few hertz up to kilohertz with the change in the air chamber pressure, evincing an influence of external acousto-optic effects on the interferometer optical fiber. To support the results, a theoretical harmonic acoustic analysis was developed and then related to the correspondent interferometer phase noise spectrum measurements. Lorentzian approximations of the experimental laser apparent linewidth suggest that the interferometer was working in a quasi-coherent regime for all tested chamber air pressure. (AU)

FAPESP's process: 17/20121-8 - Microwave Photonics with Analog/Digital Ultrafast Processing
Grantee:Tiago Sutili
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 07/56024-4 - Coherent optical technologies
Grantee:Evandro Conforti
Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE
FAPESP's process: 14/18791-7 - High Speed Space Switches for Coherent Optical Networks
Grantee:Tiago Sutili
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 15/50063-4 - Optical Interconection and Transmition Coherent Systems Technologies
Grantee:Evandro Conforti
Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE
FAPESP's process: 15/24517-8 - Photonics for next generation internet
Grantee:Hugo Enrique Hernández Figueroa
Support Opportunities: Research Projects - Thematic Grants