Performance improvement by a saturable absorber in gain-switched asymmetricwaveguide laser diodes

TY - JOUR

T1 - Performance improvement by a saturable absorber in gain-switched asymmetricwaveguide laser diodes

AU - Lanz, Brigitte

AU - Ryvkin, Boris S.

AU - Avrutin, Eugene A.

AU - Kostamovaara, Juha T.

PY - 2013/12/2

Y1 - 2013/12/2

N2 - A simplest saturable absorber, in the form of an unpumped section, is introduced into a Fabry-Perot semiconductor laser with a strongly asymmetric broadened waveguide structure incorporating a relatively thick (80 nm) active layer. This allows for suppression of trailing oscillations and a decrease in the optical pulse width compared to the uniformly biased structure. Single optical pulses of ~80 ps full width at half maximum (FWHM) and ~35 W peak power (~3 nJ pulse energy, Eopt), practically without trailing edge oscillations, were experimentally achieved under room temperature conditions by absorber-assisted gain-switching, using pumping current pulses of ~1.3 ns FWHM and ~17 A amplitude. The laser emission has a narrow (13 degrees FWHM in the transverse direction) far field.

AB - A simplest saturable absorber, in the form of an unpumped section, is introduced into a Fabry-Perot semiconductor laser with a strongly asymmetric broadened waveguide structure incorporating a relatively thick (80 nm) active layer. This allows for suppression of trailing oscillations and a decrease in the optical pulse width compared to the uniformly biased structure. Single optical pulses of ~80 ps full width at half maximum (FWHM) and ~35 W peak power (~3 nJ pulse energy, Eopt), practically without trailing edge oscillations, were experimentally achieved under room temperature conditions by absorber-assisted gain-switching, using pumping current pulses of ~1.3 ns FWHM and ~17 A amplitude. The laser emission has a narrow (13 degrees FWHM in the transverse direction) far field.

UR - http://www.scopus.com/inward/record.url?scp=84890026095&partnerID=8YFLogxK

U2 - 10.1364/OE.21.029780

DO - 10.1364/OE.21.029780

M3 - Article

AN - SCOPUS:84890026095

SN - 1094-4087

VL - 21

SP - 29780

EP - 29791

JO - Optics Express

JF - Optics Express

IS - 24

ER -