Narrow Linewidth DFB Waveguide Laser Fabricated via Ultrafast Laser Inscription

Author

Yuwen Duan ; Dekker, Peter ; Jaatinen, Esa ; Foster, Scott ; Ams, Martin ; Steel, Michael J. ; Withford, Michael J.

Author_Institution

Dept. of Phys. & Astron., Macquarie Univ., Sydney, NSW, Australia

Volume

26

Issue

24

fYear

2014

fDate

Dec.15, 15 2014

Firstpage

2499

Lastpage

2502

Abstract

Linewidth measurement of a femtosecond laser direct-written distributed feedback (DFB) waveguide laser (WGL) is reported. The WGL was fabricated in Yb-doped phosphate glass using the femtosecond laser direct-write technique. The linewidth was measured using a loss-compensated recirculating delayed self-heterodyne interferometer. By recirculating the output signal in a 10.2-km fiber delay loop, the linewidth was measured to be 35.4±1.4 kHz at a delay time of 306 μs0 , which is comparable with that of narrow-linewidth fiber DFB lasers.

Keywords

distributed feedback lasers; fibre lasers; high-speed optical techniques; laser beams; laser materials processing; laser variables measurement; light interferometry; optical glass; phosphate glasses; spectral line breadth; ytterbium; P₂O₅:Yb; WGL; Yb-doped phosphate glass; delay time; femtosecond laser direct-write technique; femtosecond laser direct-written distributed feedback waveguide laser; fiber delay loop; linewidth measurement; loss-compensated recirculating delayed self-heterodyne interferometer; narrow linewidth DFB waveguide laser; narrow-linewidth fiber DFB laser; output signal; size 10.2 km; time 30 mus; ultrafast laser inscription; Delays; Distributed feedback devices; Laser noise; Measurement by laser beam; Optical waveguides; Ultrafast optics; Waveguide lasers; Fabrication and characterization; Lasers; waveguides;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2359467

Filename

6905756