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Fostering Excellence
in Photonics and Quantum Science
at the University of Warsaw

Newsletter: Seventh Issue, April 2016

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Recent Advances in Quantum Metrology

The RAQM'2016 workshop has been organized on 02-04 March 2016 in Warsaw with the support of the PhoQuS@UW project. The workshop has been focused on recent fascinating developments in quantum metrology in order to understand various ways in which one can benefit from intrinsic quantum features of matter and light in practical metrogical protocols and get a better feeling of the present development and future prospects of the field. The Workshop has been held in the CENT I building (Banacha 2c) which is just next to the Faculty of Physics, University of Warsaw new building (Pasteura 5).

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Quantum Limits of Optical Communication

The QLOC'2016 workshop has been organized on 24-26 February 2016 in Warsaw with the support of the PhoQuS@UW project. The purpose of this workshop was to review these advances and to identify further steps towards practical exploitation of quantum enhancement in optical communication.

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On-site meeting with the representative of Oxford University

On-site meeting connected with the hands-on workshop for industry and business community was organized on March 16th, 2016. The meeting purpose was twofold. Two talks on research management and commercialization of results were addressed mostly to local partners of PhoQuS@UW project. The other two were directed to representatives of business and industry and informed about recent research achievements at the Faculty of Physics UW. The programme of the Workshop consisted of four talks: Dr. Michał Karpiński - "Ultrafast quantum communication" , Dr. Radosław Chrapkiewicz - "Imaging at the frontier of absolute darkness using a camera with an image intensifier", Dr. Eng. Anna Pastuszczak - "Applications of compressive sensing", Dr. Eng. Dariusz Smoleń - "From the concept to the market - on the way to commercialize a research project". The Workshop was concluded with an informal meeting with coffee and snacks.

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Patent application for the detection of gases

The patent application P.416703 entitled "The set-up and the method for the detection of gases based on multiplexing and demultiplexing of optical signals in laser spectroscopy" invented by Prof. Tadeusz Stacewicz, Paweł Magryta, Prof. Zbigniew Bielecki and Dr Jacek Wojtas has been submitted to the Polish Patent Office on 31.03.2016. Application summary: The invention consists of the method and of the set-up for the detection of gases with use of laser spectroscopic multiplexing of two or of multiple optical signals and demultiplexing the resulting information. Multiplexing and demultiplexing of optical signals is achieved electronically. The set-up is characteristic by enabling the simplification of the optical system and by reducing the cross-talk in the detection channels as compared to the solutions consisting solely of typical optical components (eg. dichroic filters). This solution may be applied for the set-ups based on classical optics as well as on fiber optics. The application of fiber optic components makes possible the multiplexing and demultiplexing of multiple laser beams.

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Patent for third harmonic generation

The patent PAT.220359 for the third harmonic generation entitled "Optical system, generator and method for generating the third harmonic impulses of laser light" invented by Czesław Radzewicz and Tomasz Kardaś, has been published on the 30th October 2015 by the Polish Patenting Office. The related patent application P.395808 was submitted on 29.07.2011. Application summary: The optical set-up (7) contains elements in the form of the first crystal and the second crystal with a second order nonlinearity, a birefringent plate, and half-wave plate for the base frequency, positioned in a sequence inside a housing, through which elements passes the optical path of laser pulses, wherewith the positioning order of these elements in the housing is the following: the first crystal, followed by the birefringent wave-plate, followed by the half-wave plate for the base frequency, followed by the second crystal with second order nonlinearity. The third harmonic generator for laser pulses includes the optical set-up (7) located in between the laser source (8), and the optical splitter (9). The method of third harmonic generation from laser pulses is based on that the generated laser beam (12) with pulses of the base frequency is directed onto the optical set-up (7), where the second harmonic beam (13) of pulses is generated, the relative retardation between laser pulses of base frequency and second harmonic frequency is compensated, the polarization state of base frequency pulses is rotated by 90°, which is followed by summing the base frequency pulses (12) and second harmonic beam (13) pulses and by this means creating the third harmonic laser pulses beam (14), and following the beam (12), beam (13) and beam (14) in a form of a beam group (15) are directed onto an optical splitter (9) in which the third harmonic beam (14) is selected out of other beams.

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