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Laser Diode Controller with Analog Modulation
Král, Vojtěch ; Dobesch, Aleš (referee) ; Barcík, Peter (advisor)
The Bachelor thesis deals with a design of the controller for a laser diode with the possibility of analog modulation. The basic parameters (current, voltage, temperature and optical power) are shown on an alphanumeric LCD display with the driver SPLC780. Core of this project is the laser driver MLD203CHB. Control is realized by buttons, which are setting the value of digital potenciometre, which is connected to the reference. Everything is controlled by the microcontroller ATMGEA328P. Temperature is measured with the analog sensor TMP36. Cooling of the laser diode is implemented by a peltier module controlled by the microcontroller.
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Effect of PWM control of a Laser Diode on Its Characteristics
Folta, Lukáš ; Ing. Jan Látal, Ph.D. (VŠB-TUO) (referee) ; Šťáva, Martin (advisor)
This bachelor's thesis deals with the measurement of the characteristics of two semiconductor laser diodes (LD) and its automation. The effect of current control method and LD temperature is compared here. The first chapter is devoted to the theoretical basis of the sub-areas of the experiments, a literature review dealing with laser control using pulse width modulation (PWM) is carried out, and the method of realization of the measured experiments is presented. The second chapter first defines the methods of recalculating the measured data and determines their uncertainties. The following are three subsections presenting the results of individual experiments. The first experiment deals with continuous control and the other two deal with pulse control, one using a commercially available laser driver and the other using a switch designed primarily for this work. The conclusion of the work contains a comparison of the measured results, evaluates their usability and suggests possible extensions of this work.
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Laser Diode Controller with Analog Modulation
Král, Vojtěch ; Dobesch, Aleš (referee) ; Barcík, Peter (advisor)
The Bachelor thesis deals with a design of the controller for a laser diode with the possibility of analog modulation. The basic parameters (current, voltage, temperature and optical power) are shown on an alphanumeric LCD display with the driver SPLC780. Core of this project is the laser driver MLD203CHB. Control is realized by buttons, which are setting the value of digital potenciometre, which is connected to the reference. Everything is controlled by the microcontroller ATMGEA328P. Temperature is measured with the analog sensor TMP36. Cooling of the laser diode is implemented by a peltier module controlled by the microcontroller.
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