Modeling of the optical characteristics for twin-channel laser (TCL) structures
Abstract
This paper describes the important parameters affecting the performance of TCL devices to multielement (n greater than 2) laser arrays. Calculations indicate that the presence of a uniform gain distribution over the width of the array is necessary for the excitation of the fundamental array mode and to achieve a single lobe far field. Secondly, lateral array mode stability is drastically reduced for arrays having many elements (n greater than 2) and will be difficult to achieve in practice. Lastly, it is found that the near-field intensity in laser array structures is more spatially sensitive to asymmetric perturbations induced by either current or geometry nonuniformities than single-element devices. It is suggested that some of these problems can possibly be minimized by the use of a new laser array geometry which incorporates an unequal number of array elements along the cavity length in order to spatially filter the unwanted array modes.
- Publication:
-
IEEE Journal of Quantum Electronics
- Pub Date:
- November 1986
- DOI:
- 10.1109/JQE.1986.1072916
- Bibcode:
- 1986IJQE...22.2141F
- Keywords:
-
- Laser Outputs;
- Optical Properties;
- Semiconductor Lasers;
- Arrays;
- Electron Microscopy;
- Laser Modes;
- Near Fields;
- Power Gain;
- Lasers and Masers