DocumentCode :
744443
Title :
Linewidth Measurement of Distributed-Feedback Semiconductor Lasers Operating Near 2.05 
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
Link To Document :
