Abstract
In this work, the effects of variation of active radius on modulation response of a strained In0.2Ga0.8 As/GaAs80A0 QW VCSEL have been presented after performing numerical computations on a chosen VCSEL structure. From the obtained computational results it has been observed that the resonance frequency of a VCSEL increases with the decrease of active radius. A resonance frequency of nearly 3.72 GHz was obtained after computing with an initial value of the active radius of 6 μm. An increase of resonance frequency upto 8.44 GHz has been obtained by reducing the active radius to 3 μm at an injection current of 3 mA. An enhancement of resonance frequency from 8.44 to 9.68 GHz is obtained by increasing the injection current from 3 to 3.88 mA. This enhancement of resonance frequency corresponds to an enhancement of bandwidth from 13 to 15 GHz. The active radius cannot be decreased after a certain limit because a large reduction of active radius increases the diffraction loss which will degrade the performance of the laser. For analog modulation applications, the relative intensity noise (RIN) is computed by varying active radius in this work. It has been observed that RIN decreases with the decrease of active radius. By reducing the active radius from 6 to 3 μm the RIN of a VCSEL is decreased upto −157.89 dB/Hz.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.