Author Archives: wvk_sm9je57j

text or nt

Top 10 of Applied Optics for two months running


Our paper on “Simple precision measurements of optical beam sizes” in now in the TOP 10 most downloaded paper of Applied Optics for two months in a row:

Applied Optics December 2018
Most Downloaded:

  1. Phase retrieval algorithms: a comparison Vol. 21, Issue 15, pp. 2758-2769 (1982)
  2. Laser Beams and Resonators Vol. 5, Issue 10, pp. 1550-1567 (1966)
  3. OpenFilters: open-source software for the design, optimization, and synthesis of optical filters Vol. 47, Issue 13, pp. C219-C230 (2008)
  4. Optical Constants of Water in the 200-nm to 200-μm Wavelength Region Vol. 12, Issue 3, pp. 555-563 (1973)
  5. Optical glass and glass ceramic historical aspects and recent developments: a Schott view Vol. 49, Issue 16, pp. D157-D176 (2010)
  6. Design and realization of a wide field of view infrared scanning system with an integrated micro-electromechanical system mirror Vol. 57, Issue 36, pp. 10449-10457 (2018)
  7. Absorption spectrum (380–700 nm) of pure water. II. Integrating cavity measurements Vol. 36, Issue 33, pp. 8710-8723 (1997)
  8. Optical properties of metallic films for vertical-cavity optoelectronic devices Vol. 37, Issue 22, pp. 5271-5283 (1998)
  9. Simple precision measurements of optical beam sizes Vol. 57, Issue 33, pp. 9863-9867 (2018)

  10. Lensless photography with only an image sensor Vol. 56, Issue 23, pp. 6450-6456 (2017)

Simple precision measurements of optical beam sizes

The paper is in the top 10 most downloaded papers of Applied Optics for November and December 2018.

Applied Optics 57 9863 (2018) 

M. Mylonakis, S. Pandey, K. G. Mavrakis, G. Drougakis, G. Vasilakis, D. G. Papazoglou, and W. von Klitzing 

doi: 10.1364/AO.57.009863 

Abstract: We present a simple high-precision method to quickly and accurately measure the diameters of Gaussian beams, Airy spots, and central peaks of Bessel beams ranging from sub-millimeter to many centimeters without special- ized equipment. By simply moving a wire through the beam and recording the relative losses using an optical power meter, one can easily measure the beam diameters with a precision of 1%. The accuracy of this method has been experimentally verified for Gaussian beams down to the limit of a commercial slit-based beam profiler (3%).

Image of the setup of the beam diameter measurement

Setup of the beam diameter measurement

Plot of the real beam size calculated from the minimum transmitivity.

Real beam size as a function of the minimum transmitivity.


Antireflection coated semiconductor laser amplifier for Bose-Einstein condensation experiments

AIP Advances 8 095020 (2018)  

S. Pandey, H. Mas, G. Drougakis, K. G. Mavrakis, M. Mylonakis, G. Vasilakis, V. Bolpasi, and W. von Klitzing


We present a slave laser highly suitable for the preparation and detection of 87Rb Bose-Einstein condensates (BEC). A highly anti-reflection coated laser diode serves as an optical amplifier, which requires neither active temperature stabilization nor dedicated equipment monitoring the spectral purity of the amplified light. The laser power can be controlled with a precision of 10μW in 70mW with relative fluctuations down to 2 × 10^−4. Due to its simplicity and reliability, this slave laser will be a useful tool for laboratory, mobile, or even space-based cold-atom experiments. By the way of demonstration this slave laser was used as the sole 780nm light-source in the production of 3×10^4 BECs in a hybrid magnetic/dipole trap.

Figure 1: Stability of the power of a AR-coated diode lase slave.