Linewidth Measurement of Distributed-Feedback Semiconductor Lasers Operating Near 2.05 $\\mu text{m}$

Author

Bagheri, Mahmood ; Spiers, Gary D. ; Frez, Clifford ; Forouhar, Siamak ; Aflatouni, Firooz

Author_Institution

Jet Propulsion Lab., California Inst. of Technolology, Pasadena, CA, USA

Volume

27

Issue

18

fYear

2015

Firstpage

1934

Lastpage

1937

Abstract

The first unambiguous linewidth measurements are reported for fiber-pigtailed high-power distributed feedback (DFB) semiconductor lasers operating near 2.05 μm wavelength range. The DFB lasers are packaged inside standard 14-pin butterfly package with polarization- maintaining output fiber and an integrated optical isolator. The Schawlow-Townes linewidth was measured using the coherent frequency-discriminator technique with a fiber Mach-Zehnder interferometer and the total linewidth was characterized using a heterodyne setup. Our measurements indicate less than 100 KHz Schawlow-Townes linewidth and a total linewidth of less than 200 KHz over 50 ms measurement time.

Keywords

Mach-Zehnder interferometers; distributed feedback lasers; integrated optoelectronics; laser variables measurement; light coherence; optical fibre polarisation; optical isolators; quantum well lasers; DFB lasers; Schawlow-Townes linewidth; coherent frequency-discriminator technique; fiber Mach-Zehnder interferometer; fiber-pigtailed high-power distributed feedback semiconductor lasers; heterodyne setup; integrated optical isolator; polarization-maintaining output fiber; standard 14-pin butterfly package; unambiguous linewidth measurements; Frequency measurement; Measurement by laser beam; Optical feedback; Optical variables measurement; Power lasers; Semiconductor device measurement; Semiconductor lasers; Distributed-feedback lasers; Fiber optics; Mid- IR laser; fiber optics; mid-IR laser;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2447286

Filename

7132707