The Experts below are selected from a list of 5097 Experts worldwide ranked by ideXlab platform
Peter J P.j. Winzer - One of the best experts on this subject based on the ideXlab platform.
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an opto electronic Interferometer and its use in subcarrier add drop multiplexing
Journal of Lightwave Technology, 2013Co-Authors: Peter J P.j. WinzerAbstract:Conventional Interferometers split and recombine an optical signal after some limited optical processing in one or more of their interference paths. We study an Interferometer structure that converts the signal to a different wavelength range for processing and converts it back to the original wavelength for interference. In particular, we consider intradyne conversion of the optical signal in one Interferometer Arm to digital electronic baseband, followed by digital electronic signal processing and subsequent electro-optic conversion, using the same laser for local oscillator and retransmitted signal. This allows for arbitrary time/frequency manipulations of an optical signal within the system's bandwidth capabilities while letting the other frequency portions of the signal pass through the system unchanged. We quantify the performance of such an opto-electronic Interferometer as a subcarrier add/drop node in a digital optical communication system and study its tolerance to important practical hardware limitations.
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An opto-electronic Interferometer and its use in subcarrier add/drop multiplexing
Journal of Lightwave Technology, 2013Co-Authors: Peter J P.j. WinzerAbstract:Conventional Interferometers split and recombine an optical signal after some limited optical processing in one or more of their interference paths. We study an Interferometer structure that converts the signal to a different wavelength range for processing and converts it back to the original wavelength for interference. In particular, we consider intradyne conversion of the optical signal in one Interferometer Arm to digital electronic baseband, followed by digital electronic signal processing and subsequent electro-optic conversion, using the same laser for local oscillator and retransmitted signal. This allows for arbitrary time/frequency manipulations of an optical signal within the system's bandwidth capabilities while letting the other frequency portions of the signal pass through the system unchanged. We quantify the performance of such an opto-electronic Interferometer as a subcarrier add/drop node in a digital optical communication system and study its tolerance to important practical hardware limitations.
Ernest Weingartner - One of the best experts on this subject based on the ideXlab platform.
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A single-beam photothermal Interferometer for in situ measurements of aerosol light absorption
Atmospheric Measurement Techniques, 2020Co-Authors: Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest WeingartnerAbstract:Abstract. We have developed a novel single-beam photothermal Interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set-up and significantly easier alignment compared to standard dual-beam photothermal Interferometers, making it ideal for field measurements. Due to a unique configuration of the reference Interferometer Arm, light absorption by aerosols can be determined directly – even in the presence of light-absorbing gases. The instrument can be calibrated directly with light-absorbing gases, such as NO2 , and can be used to calibrate other light absorption instruments. The detection limits (1 σ ) for absorption for 10 and 60 s averaging times were determined to be 14.6 and 7.4 Mm−1 , respectively, which for a mass absorption cross section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 and 740 ng m−3 , respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.
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A single-beam photothermal Interferometer for in-situ measurements of aerosol light absorption
2020Co-Authors: Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest WeingartnerAbstract:Abstract. We have developed a novel single-beam photothermal Interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set up and significantly easier alignment compared to standard dual-beam photothermal Interferometers, making it ideal for field measurements. Due to a unique configuration of the reference Interferometer Arm, light absorption by aerosols can be determined directly even in the presence of light absorbing gases. The instrument can be calibrated directly with light absorbing gases, such as NO2, and can be used to calibrate other light absorption instruments. The detection limits (1σ) for absorption for ten and sixty second averaging times were determined to be 14.6 Mm−1 and 7.4 Mm−1, respectively, which for a mass absorption cross-section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 ng m−3 and 740 ng m−3, respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.
Bradley Visser - One of the best experts on this subject based on the ideXlab platform.
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A single-beam photothermal Interferometer for in situ measurements of aerosol light absorption
Atmospheric Measurement Techniques, 2020Co-Authors: Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest WeingartnerAbstract:Abstract. We have developed a novel single-beam photothermal Interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set-up and significantly easier alignment compared to standard dual-beam photothermal Interferometers, making it ideal for field measurements. Due to a unique configuration of the reference Interferometer Arm, light absorption by aerosols can be determined directly – even in the presence of light-absorbing gases. The instrument can be calibrated directly with light-absorbing gases, such as NO2 , and can be used to calibrate other light absorption instruments. The detection limits (1 σ ) for absorption for 10 and 60 s averaging times were determined to be 14.6 and 7.4 Mm−1 , respectively, which for a mass absorption cross section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 and 740 ng m−3 , respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.
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A single-beam photothermal Interferometer for in-situ measurements of aerosol light absorption
2020Co-Authors: Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest WeingartnerAbstract:Abstract. We have developed a novel single-beam photothermal Interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set up and significantly easier alignment compared to standard dual-beam photothermal Interferometers, making it ideal for field measurements. Due to a unique configuration of the reference Interferometer Arm, light absorption by aerosols can be determined directly even in the presence of light absorbing gases. The instrument can be calibrated directly with light absorbing gases, such as NO2, and can be used to calibrate other light absorption instruments. The detection limits (1σ) for absorption for ten and sixty second averaging times were determined to be 14.6 Mm−1 and 7.4 Mm−1, respectively, which for a mass absorption cross-section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 ng m−3 and 740 ng m−3, respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.
Peter Steigmeier - One of the best experts on this subject based on the ideXlab platform.
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A single-beam photothermal Interferometer for in situ measurements of aerosol light absorption
Atmospheric Measurement Techniques, 2020Co-Authors: Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest WeingartnerAbstract:Abstract. We have developed a novel single-beam photothermal Interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set-up and significantly easier alignment compared to standard dual-beam photothermal Interferometers, making it ideal for field measurements. Due to a unique configuration of the reference Interferometer Arm, light absorption by aerosols can be determined directly – even in the presence of light-absorbing gases. The instrument can be calibrated directly with light-absorbing gases, such as NO2 , and can be used to calibrate other light absorption instruments. The detection limits (1 σ ) for absorption for 10 and 60 s averaging times were determined to be 14.6 and 7.4 Mm−1 , respectively, which for a mass absorption cross section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 and 740 ng m−3 , respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.
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A single-beam photothermal Interferometer for in-situ measurements of aerosol light absorption
2020Co-Authors: Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest WeingartnerAbstract:Abstract. We have developed a novel single-beam photothermal Interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set up and significantly easier alignment compared to standard dual-beam photothermal Interferometers, making it ideal for field measurements. Due to a unique configuration of the reference Interferometer Arm, light absorption by aerosols can be determined directly even in the presence of light absorbing gases. The instrument can be calibrated directly with light absorbing gases, such as NO2, and can be used to calibrate other light absorption instruments. The detection limits (1σ) for absorption for ten and sixty second averaging times were determined to be 14.6 Mm−1 and 7.4 Mm−1, respectively, which for a mass absorption cross-section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 ng m−3 and 740 ng m−3, respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.
Luka Drinovec - One of the best experts on this subject based on the ideXlab platform.
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A single-beam photothermal Interferometer for in situ measurements of aerosol light absorption
Atmospheric Measurement Techniques, 2020Co-Authors: Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest WeingartnerAbstract:Abstract. We have developed a novel single-beam photothermal Interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set-up and significantly easier alignment compared to standard dual-beam photothermal Interferometers, making it ideal for field measurements. Due to a unique configuration of the reference Interferometer Arm, light absorption by aerosols can be determined directly – even in the presence of light-absorbing gases. The instrument can be calibrated directly with light-absorbing gases, such as NO2 , and can be used to calibrate other light absorption instruments. The detection limits (1 σ ) for absorption for 10 and 60 s averaging times were determined to be 14.6 and 7.4 Mm−1 , respectively, which for a mass absorption cross section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 and 740 ng m−3 , respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.
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A single-beam photothermal Interferometer for in-situ measurements of aerosol light absorption
2020Co-Authors: Bradley Visser, Jannis Röhrbein, Peter Steigmeier, Luka Drinovec, Griša Močnik, Ernest WeingartnerAbstract:Abstract. We have developed a novel single-beam photothermal Interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set up and significantly easier alignment compared to standard dual-beam photothermal Interferometers, making it ideal for field measurements. Due to a unique configuration of the reference Interferometer Arm, light absorption by aerosols can be determined directly even in the presence of light absorbing gases. The instrument can be calibrated directly with light absorbing gases, such as NO2, and can be used to calibrate other light absorption instruments. The detection limits (1σ) for absorption for ten and sixty second averaging times were determined to be 14.6 Mm−1 and 7.4 Mm−1, respectively, which for a mass absorption cross-section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 ng m−3 and 740 ng m−3, respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed.