Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

1/f noise in external-cavity InGaN diode laser at 420 nm wavelength for atomic spectroscopy

Not Accessible

Your library or personal account may give you access

Abstract

We have extensively studied the frequency noise and relative intensity noise spectra in a tunable external-cavity InGaN diode laser at blue (420 nm) wavelengths. We report flicker (1/f) frequency-noise behavior at low Fourier frequencies measured using offset frequency-absorption spectroscopy on Rb85 vapor cells, which yields an estimated lasing linewidth of 870 kHz. From considerations of high-dislocation density in III nitride epitaxy, 1/f noise and linewidth were expected to be larger than in conventional III-V lasers. Surprisingly, the measured noise characteristics are comparable to or better than those of near-infrared distributed feedback lasers and external-cavity diode lasers. The noise-reduction mechanism is attributed to the wavelength dependence of 1/f noise. We discuss challenges in atomic spectroscopy applications caused by defects and mode-clustering effect in GaN lasers. Using the Hakki–Paoli analysis in an aged laser diode, we provide possible explanation about the origin of observed mode clustering.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
400  mW external cavity diode laser with narrowband emission at 445  nm

N. Ruhnke, A. Müller, B. Eppich, M. Maiwald, B. Sumpf, G. Erbert, and G. Tränkle
Opt. Lett. 39(13) 3794-3797 (2014)

External cavity diode lasers with 5kHz linewidth and 200nm tuning range at 1.55μm and methods for linewidth measurement

Shayne Bennetts, Gordon D. McDonald, Kyle S. Hardman, John E. Debs, Carlos C. N. Kuhn, John D. Close, and Nicholas P Robins
Opt. Express 22(9) 10642-10654 (2014)

Characteristics of the single-longitudinal-mode planar-waveguide external cavity diode laser at 1064  nm

Kenji Numata, Mazin Alalusi, Lew Stolpner, Georgios Margaritis, Jordan Camp, and Michael Krainak
Opt. Lett. 39(7) 2101-2104 (2014)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved