Simulation of Modal Control of Metal Mode-Filtered Vertical-Cavity Surface-Emitting Laser.

Area of Science:

• Optics and Photonics
• Semiconductor Devices

Background:

• Vertical-cavity surface-emitting lasers (VCSELs) are crucial components in optical communication and sensing.
• Controlling transverse modes in VCSELs is essential for optimizing device performance and beam quality.

Purpose of the Study:

• To propose and theoretically analyze a novel metal-dielectric film mode filter structure.
• To demonstrate flexible regulation of transverse modes within VCSELs.

Main Methods:

• Development of a metal-dielectric film mode filter structure.
• Simulation and theoretical analysis of the filter's effect on VCSEL transverse modes.
• Definition of a new parameter for mode identification.

Main Results:

• The proposed filter enables flexible adjustment of the number, volume, and stability of transverse modes.
• Control is achieved by tuning three key parameters: oxide aperture, metal aperture, and their separation distance.
• A flexible window for mode control is established.

Conclusions:

• The study provides a robust theoretical foundation and calculation methodology for optical mode control in VCSELs.
• The novel filter design offers significant potential for enhancing VCSEL performance and applications.
• This work contributes to the advancement of tunable laser technology.