Prediction of Single-Mode Fiber Coupling Efficiencies of a Tapered Diode Laser From Measured Wigner Distribution Functions

Author

Uebernickel, Mirko ; Eppich, Bernd ; Paschke, Katrin ; Erbert, Götz ; Tränkle, Günther

Author_Institution

Ferdinand-Braun-Inst., Leibniz Inst. fur Hochstfrequenztechnik, Berlin, Germany

Volume

24

Issue

14

fYear

2012

fDate

7/15/2012 12:00:00 AM

Firstpage

1248

Lastpage

1250

Abstract

In this letter, we demonstrate how the coupling efficiency of a tapered diode laser (TPL) into a single-mode fiber under specified conditions can be predicted from measured Wigner distribution functions (WDFs). The WDFs were measured with a simple setup similar to the method of measuring the beam propagation ratio M² as specified in the ISO standard 11146. We used the measured WDFs to predict the coupling efficiencies of the beam into a single-mode fiber by using a predefined and well-known optical system. We then realized the fiber coupling and compared the measured coupling efficiencies to the predicted values. For this comparison we used the beam of a distributed Bragg reflector TPL which emits a fairly complex and structured beam. The predictions fitted the experimental result with relative deviations below 10%.

Keywords

Wigner distribution; distributed Bragg reflectors; optical fibre couplers; semiconductor lasers; Wigner distribution functions; distributed Bragg reflector; single-mode fiber coupling; tapered diode laser; Couplings; Laser beams; Lenses; Measurement by laser beam; Optical fibers; Optical variables measurement; Fiber coupling; Wigner distribution function (WDF); tapered diode laser (TPL);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2199746

Filename

6200833