ENHANCEMENT OF ACTIVE MEDIUM PUMP EFFICIENCY FOR A DISTRIBUTED FEEDBACK WAVEGUIDE LASER
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2017, Vol 885, Issue 2017
Abstract
On the basis of dielectric gratings, in which dielectric permittivity can be complex, and the imaginary part can be both positive and negative, waveguide microlasers are developed. The advantage of waveguide microlasers, comparing to conventional lasers are a low pump threshold, compactness and easy design for optical integration. The structure of distributed feedback (DFB) is considered as the most important configuration of waveguide lasers. In the article a model of waveguide laser with distributed feedback is calculated using the method of coupled waves. Due to the presence in the waveguide of the active medium and the Bragg grating, with certain grating parameters, laser generation is possible. This is due to the fact that the incident electromagnetic wave on the waveguide layer diffracts on the Bragg grating, while it becomes a waveguide mode. Due to the effect of the resonance of the waveguide mode, there is a laser generation along the normal to the surface of the grating. The necessary condition for laser generation is the optimization of the parameters of the grating and the angle of incidence of the pump beam, which was carried out in this paper. In this paper we used configuration of the DFB waveguide laser in which Bragg grating was written in active medium. With such theoretical model, we calculated grating parameters, required for laser generation to occur.
Authors and Affiliations
A. V. Bendzyak, Volodymyr Fitio
Keywords
Related Articles
- EP ID EP456382
- DOI -
- Views 111
- Downloads 0
MATCHING UP OF IMAGES WHICH FORMED BY SENSORS OF DIFFERENT PHYSICAL NATURE IN THE PROCESS OF SIGNAL FUSION IN MULTISPECTRAL MONITORING SYSTEMS
Multispectral monitoring systems are becoming more widely used in which the fusion of information obtained in the form of different spectral images is applied. Direct fusion of such images is impossible in connection wit...
CDMA2000 CHANNEL MODELING BASED ON THE GILBERT–ELLIOT ALGORITHM WITHIN URBAN INFRASTRUCTURE
Any radio channel transferring information is a subject to data corruption. Especially it’s important for 3G mobile networks that use high frequency carrier wave and significantly increased data rate in channel. In this...
ALGORITHMS FOR ROUTING AND QUALITY OF SERVICE MESSAGES MULTI-SERVICE NETWORK CONNECTION
This paper considers the options for combining routing algorithms in a single method for multiservice communication networks. For a comparative analysis of the quality of service communications multiservice communication...
EFFECTIVE CAPACITY EVALUATION MODEL FOR COGNITIVE RADIO NETWORKS USING OFDM
In this paper considered the cognitive radio (CR) networks with the GSM network like primary network cooperation possibility. The cognitive radio system meant radio with a selfmanagement mechanism with different levels o...
OPTIMIZATION METHODS FOR TELECOMMUNICATIONS NETWORKS PHYSICAL AND LOGICAL STRUCTURES
The article deals with reasons why the planned network resource is not used completely. The main attention is paid to the dynamic routing protocol, which does not consider the current load of local network segments accor...