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1

Simple wavelength preselection and stabilization of the single-frequency operation of a microchip laser

Antończak A. J., Soboń G., Abramski K. M.

Opto-Electronics Review

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2013

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Vol. 21, No. 2

199-204

EN

This paper presents the concept and experimental verification of a simple method of wavelength preselection of a single frequency, second-harmonic generation SHG solid state laser Nd:YAG/KTP with the Lyot filter. Apart from well-known configuration of single-frequency operation, the Lyot filter to stabilization of the wavelength was used. The idea presented is based on a measurement of the losses introduced by the Lyot filter inside the laser cavity, or the maximums of laser output power as a measure of the assessment of the Lyot filter tuning to a required laser longitudinal mode, not requiring any external frequency standards. This method allows for the synthesization and stabilization of a selected wavelength from the spectrum range of the gain curve of the laser with the period determined by the "Lyot comb". In the developed system 15 values of wavelength spaced at about 32 pm (∼ 7.9 GHz) for the infrared radiation were obtained.

2

Laser prototyping of printed circuit boards

Nowak M. R., Antończak A. J., Kozioł P. E., Abramski K. M.

Opto-Electronics Review

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2013

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Vol. 21, No. 3

320-325

EN

This paper describes the application of laser micromachining to rapid prototyping of printed circuit boards (PCB) using nanosecond lasers: the solid-state Nd:YAG (532/1064 nm) laser and the Yb:glass fiber laser (1060 nm). Our investigations included tests for various mask types (synthetic lacquer, light-sensitive emulsion and tin). The purpose of these tests was to determine some of the basic parameters such as the resolution of PCB prototyping, speed of processing and quality of PCB mapping with commonly available laser systems. Optimization of process parameters and the proposed conversion algorithm have allowed us to produce circuit boards with a resolution similar to that of the Laser Direct Imaging (LDI) technology.

3

Single-longitudinal mode Nd:YVO₄/YVO₄/KTP green solid state laser

Sotor J. Z., Antończak A. J., Abramski K. M.

Opto-Electronics Review

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2010

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Vol. 18, No. 1

75-79

EN

We present the concept and practical realization of a single frequency, tuneable diode pumped Nd:YVO₄/YVO₄/KTP microchip laser operating at 532 nm. Theoretical analysis of the single mode operation of such a laser configuration is presented. The single frequency operation has been obtained in a birefringent filter, where an YVO₄ beam displacer acts as an ideal polarizer. Experimental results are in good agreement with theoretical analysis. We have obtained stable single frequency operation, tuneable over 0.6 nm in the spectral range around 1064 nm. The laser operated with output power up to 110 mW at 53 nm. The total optical efficiency (808 nm to 532 nm) was 14%.

4

Blue 473-nm solid state diode pumped Nd:YAG/BiBO microchip laser

Antończak A. J., Sotor J. Z., Matysiak M., Abramski K. M.

Opto-Electronics Review

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2010

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Vol. 18, No. 1

71-74

EN

In this paper we present a design of a compact, low power diode-pumped CW Nd:YAG laser operating at 946 nm with intracavity blue light generation at 473 nm for battery operated applications. The nonlinear crystal used in the experiment is a BiBO crystal cut for phase-matching type I. Using 0.8 W of pumping power, 20-mW stabile output power of blue light was achieved. The second harmonic generation conversion efficiency was 2.5%.

5

Układy kontroli i aktywnej stabilizacji częstotliwości jednoczęstotliwościowych mikrolaserów ciała stałego

Antończak A. J., Sotor J. Z., Abramski K. M.

Elektronika : konstrukcje, technologie, zastosowania

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2008

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Vol. 49, nr 11

104-108

PL

W pracy zaprezentowano praktyczną realizację jednoczęstotliwościowego mikrolasera Nd:YAG/KTP z dwójłomnym filtrem Lyota. Zaprezentowano nowy oryginalny układ stabilizacji częstotliwości z wykorzystaniem światłowodowej siatki Bragga jako znacznika częstotliwości. Określono długoterminową stałość częstotliwości badanych jako: 6-10⁻⁷.

EN

The paper deals with the basic set-up of single-frequency microchip laser - so called Lyot filter configuration. Some results obtained for neodymium microchip lasers are presented. New techniques of frequency stabilization by external fiber Bragg grating is presented. Long term frequency stability of the lasers at the level of 6-10⁻⁷ was obtained.

6

Single-frequency microchip solid state diode pumped lasers

Antończak A. J., Sotor J. Z., Abramski K. M.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2008

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Vol. 56, nr 2

113-116

EN

The paper deals with the basic set-up of single-frequency microchip laser - so called Lyot filter configuration. Description of its operation and practical realization is given. Some results obtained for Nd:YAG/KTP microchip laser are presented. The evidences of single-frequency operation and its limits are emphasized. Described construction constitutes the base for building the frequency stabilization of green 532 nm microchip laser.

7

Laser Doppler vibrometry with acoustooptic frequency shift

Kaczmarek P. R., Rogowski T., Antończak A. J., Abramski K. M.

Optica Applicata

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2004

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Vol. 34, nr 3

373-384

EN

This paper describes our experiments and investigations on vibration measurements by laser interferometers. The main objective was to build a simple heterodyne interferometer which would allow vibrations of objects with light scattering surface to be measured. The optimisation procedure of optical setup, basic heterodyne interferometer and results are presented.