Continuously chirped DFB gratings by specially bent waveguides for tunable lasers

Author

Hillmer, Hartmut ; Grabmaier, Anton ; Zhu, H.L. ; Hansmann, Stefan ; Burkhard, Herbert

Author_Institution

Deutsche Telekom, Darmstadt, Germany

Volume

13

Issue

9

fYear

1995

fDate

9/1/1995 12:00:00 AM

Firstpage

1905

Lastpage

1912

Abstract

We have implemented and studied a new type of tunable multiple-section semiconductor distributed feedback (DFB) laser using tailored chirped DFB gratings. Arbitrarily and continuously chirped DFB gratings are defined by bent waveguides on homogeneous grating fields with ultrahigh spatial precision. The mathematical bending functions are optimized in this case to provide enlarged wavelength tuning ranges. We present the results of model calculations, the technological device realization and experimental results of the DFB laser characterization e.g. a tuning range of 5.5 nm without wavelength gaps and high side mode suppression ratio

Keywords

bending; diffraction gratings; distributed feedback lasers; laser feedback; laser modes; laser tuning; semiconductor lasers; waveguide lasers; DFB laser; DFB laser characterization; bent waveguides; continuously chirped DFB gratings; enlarged wavelength tuning ranges; high side mode suppression ratio; homogeneous grating fields; mathematical bending function optimisation; model calculations; specially bent waveguides; tailored chirped DFB gratings; technological device realization; tunable lasers; tunable multiple-section semiconductor distributed feedback laser; tuning range; ultrahigh spatial precision; wavelength gaps; Chirp; Distributed feedback devices; Gratings; Laser feedback; Laser modes; Laser tuning; Semiconductor lasers; Semiconductor waveguides; Tunable circuits and devices; Waveguide lasers;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.464742

Filename

464742