Features of laser diodes' radiation in different temperature intervals

Journal Title: Вестник МГТУ - Year 2017, Vol 20, Issue 4


In the literature there is practically no information on the change in the characteristics of the emission spectrum of industrial semiconductor laser diodes in a wide range of temperatures, including cryogenic temperatures. Nevertheless, this information is decisive when choosing specific laser diodes for industrial devices. An experimental study of features of the emission spectra of laser semiconductor diodes in the temperature range 50–300 K has been conducted. The material used in the laser diodes' manufacture is a compound based on the solid quaternary AlGaInP solution. The radiation spectrum has been investigated using a monochromator MDR-23 with a CCD detector installed. The study has proved that the temperature of the laser diode operation determines the nature of the radiation spectrum, in particular the predominance of stimulated or induced radiation has taken place, the range of wavelengths of radiation changes as well. It is believed that in the temperature range from 50 to 300 K in the volume of the laser diode material some processes are realized, as a result of which the value of the forbidden band width changes, it decreases by approximately 4.2–4.5 % from the value corresponding to the temperature of 50 K. The calculation of the value of the temperature coefficient of the change in the forbidden band width has shown that in the temperature range from 50 to 300 K the meaning of β varies in absolute value by 2–3 times. A new experimental method for determining ionization energies of exciton levels has been proposed. It is of practical use for monitoring the electro-physical parameters of semiconductor materials used in the manufacture of industrial semiconductor lasers. The advantage of the proposed method is the ability to obtain qualitative and quantitative information about the exciton spectrum of the laser diode material directly in the region of the p–n-junction where the laser radiation is formed.

Authors and Affiliations

S. V. Vlasova, A. B. Vlasov, P. Yu. Shapochkin


Related Articles

Expansion of assortment of culinary products from the grown fish

The studies have been carried out to expand the range of molded fish culinary products by some technological modification of recipes for complex culinary products and croquettes. The composition of fish complex culinary...

Classification of navigational and fishing situations by the ship's specialist

Operations of synthesis and analysis of the state of the navigational or fishing situation are performed by a shipboard specialist who carrying watch, he ought to take into account a large number of contradictory factors...

Compliance of information on the content of vitamins when labeling confectionery products with their actual content

Confectionery products possessing an adjusted chemical composition to increase the content of vitamins can serve as an additional their source in human diet. The purpose of the study is to assess the compliance of inform...

Improving the process of grinding food products

There are a large number of studies on the grinding of various types of food raw materials, however, today there is no comprehensive approach to justifying the influence of the design and operational parameters of the gr...

The stability of pigments in the thalli and extracts of the Barents Sea fucus algae

Fucus algae of the Barents Sea are a promising source of biologically active substances (BAS), including carotenoid and chlorophyll pigments. The main direction of processing these types of brown algae is aimed at obtain...

Download PDF file
  • EP ID EP255651
  • DOI 10.21443/1560-9278-2017-20-4-697-704
  • Views 71
  • Downloads 0

How To Cite

S. V. Vlasova, A. B. Vlasov, P. Yu. Shapochkin (2017). Features of laser diodes' radiation in different temperature intervals. Вестник МГТУ, 20(4), 697-704. https://europub.co.uk/articles/-A-255651