Abstract
The single mode square lattice photonic-crystal vertical-cavity surface-emitting lasers (PC-VCSELs) are proposed and demonstrated. Square-lattice photonic-crystal patterns of various lattice constants are introduced on top mirrors of VCSELs having two different current apertures. The maximum single mode output power of about 1 mW is obtained from the device with lattice constant of 5.0 m and current aperture of 16 m. The PC-VCSEL operates in a single transverse mode in an entire operating current range with a side-mode suppression ratio of over 20 dB. The asymmetric introduction of smaller air holes improves the polarization selectivity.
Highlights
The stable single mode laser with small divergence angle is advantageous for reliable high speed data transmission
Photonic-crystal VCSELs have been demonstrated to be effective for transverse mode control [4,5,6,7]
To achieve the stable single transverse mode, photonic crystal patterns with three different kinds of lattice constant are fabricated for VCSELs with two different current apertures
Summary
The stable single mode laser with small divergence angle is advantageous for reliable high speed data transmission. In addition to the single mode operation, the control and stabilization of output polarization are essential for most applications. Photonic-crystal VCSELs have been demonstrated to be effective for transverse mode control [4,5,6,7]. PC-VCSELs with different photonic-crystal lattice structure have not yet been investigated. We have introduced square lattice photonic-crystal patterns in the top mirror of VCSELs to obtain a single transverse mode. To achieve the stable single transverse mode, photonic crystal patterns with three different kinds of lattice constant are fabricated for VCSELs with two different current apertures. Polarization properties of the square-lattice PC-VCSEL with relatively low 4-fold symmetry are investigated. Improvement of polarization selectivity is observed by the asymmetric introduction of two small air holes
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
