Research On The Wavelength Tuning Character Of Couple-Cavity Vertical-Cavity Surface-Emitting Laser

As a new type of semiconductor laser, vertical-cavity surface-emitting laser (VCSEL) has many advantages, such as very lower threshold current, smaller far-field divergent angle, circular beams compatible with optical fibers, and easy to realize single longitudinal mode operation and 2-dimension integration etc. Coupled-cavity vertical-cavity surface-emitting laser(CC-VCSEL) inherited all the advantages of VCSEL, at the same time it can achieve dual-wavelength output, can play important roles in dense wavelength-division multiplexing (DWDM), THz frequency generator and dual-wavelength measure. So it has attracted more and more attentions.In this thesis,after the considerating the refraction of the top and bottom cavities veries with the carrier density, the proportion is 'b1' and 'b2',the light field balance equations are established by using the top and the bottom DBRs' boundary conditions and the couple transfer matrix of the middle DBRs for CC-VCSEL.Sloved the equations, the cavity's threshold carrier density and the influence to the output wavelength can be obtained. The influence of those two important parameters to the output wavelength are analyzed: the proportion between the two cavities' refraction and the carrier density; the effect of the number of periods in the middle DBR.The threshold current characteristics is obtained by using steady-state carrier rate equations, cavity's threshold carrier density and couple parameters. Further more the tuning character of the CC-VCSEL can be deduced.