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Alias M.S.,Telekom Malaysia Research and Development TMRandD | Shaari S.,National University of Malaysia | Mitani S.M.,Telekom Malaysia Research and Development TMRandD
Laser Physics | Year: 2010

An experimental study has been presented of the oxide-confined vertical-cavity surface-emitting lasers (VCSEL) operating in the 850 nm region of the electromagnetic spectrum. In this regard, various relevant VCSEL samples with numerous oxide aperture sizes have been fabricated and characterized. Thorough investigations of the electrical as well as optical characteristics of the fabricated samples have been performed which includes the overall device performance as a function of the oxidize aperture sizes. It is reported that the VCSEL with oxide aperture size <10 μm require low threshold currents (<1 mA). Further, the differential quantum efficiencies up to 28% were measured for a number of these devices. It is found that devices employing oxide aperture of 10 to 15 μm shows promising electro-optical characteristics for 850 nm oxide VCSEL optimization. © 2010 Pleiades Publishing, Ltd. Source


Alias M.S.,Telekom Malaysia Research and Development TMRandD | Mitani S.M.,Telekom Malaysia Research and Development TMRandD | Maskuriy F.,Telekom Malaysia Research and Development TMRandD
Optik | Year: 2012

Comprehensive analysis of GaInNAs edge-emitting laser operating near 1300 nm wavelength are made to underline the behavioural features of the proposed laser device, in view of the analytical investigation for various material and device electrical-optical parameters analysis such as band diagram, material gain, quantum well emission wavelength, optical wave and mode profiles, light-current-voltage characteristic, output mode spectrum, current distribution and far-field profile. The material analysis indicates that a high quality GaInNAs active region is designed, where high material gain and photoluminescence wavelength near 1.3 μm are achieved. The device obtains low threshold current operation with lasing emission around 1.285 μm. © 2011 Elsevier GmbH. All rights reserved. Source

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