14 research outputs found

    Carbon nanowalls: the next step for physical manifestation of the black body coating

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    The optical properties of carbon nanowall (CNW) films in the visible range have been studied and reported for the first time. Depending on the film structure, ultra-low total reflectance up to 0.13% can be reached, which makes the CNW films a promising candidate for the black body-like coating, and thus for a wide range of applications as a light absorber. We have estimated important trends in the optical property variation from sample to sample, and identified the presence of edge states and domain boundaries in carbon nanowalls as well as the film mass density variation as the key factors. Also we demonstrated that at much lower film thickness and density than for a carbon nanotube forest the CNWs yield one order higher specific light absorption

    Π₯ΠΠ ΠΠšΠ’Π•Π Π˜Π‘Π’Π˜ΠšΠ˜ Π”ΠΠ’Π§Π˜ΠšΠ ΠœΠΠ›Π«Π₯ Π£Π“Π›ΠžΠ’Π«Π₯ ΠŸΠ•Π Π•ΠœΠ•Π©Π•ΠΠ˜Π™, ΠŸΠžΠ‘Π’Π ΠžΠ•ΠΠΠžΠ“Πž Π‘ ΠŸΠ Π˜ΠœΠ•ΠΠ•ΠΠ˜Π•Πœ Π‘Π˜Π‘Π’Π•ΠœΠ« Π˜Π— Π”Π’Π£Π₯ Π€ΠΠ—ΠžΠ’Π«Π₯ Π”Π˜Π€Π ΠΠšΠ¦Π˜ΠžΠΠΠ«Π₯ Π Π•Π¨ΠΠ’ΠžΠš

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    Sensors of small angular displacements and oscillations of objects constructed using a system of two phase diffraction gratings located at some distance from each other are investigated. The scheme of the sensor, and the results of experimental studies its characteristics are presented. Experimental sensitivity for recording angular vibrations was 10-5 radians.Π˜ΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ‹ Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠΈ ΠΌΠ°Π»Ρ‹Ρ… ΡƒΠ³Π»ΠΎΠ²Ρ‹Ρ… ΠΏΠ΅Ρ€Π΅ΠΌΠ΅Ρ‰Π΅Π½ΠΈΠΉ ΠΈ ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΠΎΠ±ΡŠΠ΅ΠΊΡ‚ΠΎΠ², ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Π΅ построСны с ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ систСмы ΠΈΠ· Π΄Π²ΡƒΡ… Ρ„Π°Π·ΠΎΠ²Ρ‹Ρ… Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½Ρ‹Ρ… Ρ€Π΅ΡˆΡΡ‚ΠΎΠΊ (Π”Π ). ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½Ρ‹ схСма Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠ°, Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ исслСдований Ρ€Π°Π±ΠΎΡ‡ΠΈΡ… характСристик ΠΈ ΠΎΡ†Π΅Π½ΠΊΠ° Ρ‡ΡƒΠ²ΡΡ‚Π²ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΡΡ‚ΠΈ Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠ°. На ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… ΠΎΠ±Ρ€Π°Π·Ρ†Π°Ρ… Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠΎΠ² Ρ‡ΡƒΠ²ΡΡ‚Π²ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΡΡ‚ΡŒ ΠΏΡ€ΠΈ рСгистрации ΡƒΠ³Π»ΠΎΠ²Ρ‹Ρ… ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ составила 10-5 Ρ€Π°Π΄ΠΈΠ°Π½

    Laser beam modulation using corner reflector and deep diffraction grating

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    A new scheme of the power modulator of laser beam is based on a corner-reflector unit with a relief diffraction grating that is placed on a plane of the unit and has a relief depth of several wavelengths of the laser radiation. It is shown that angular oscillations of the unit make it possible to implement modulation of the zero-order diffraction beam at a modulation depth of almost 100% and a relatively high linearity of the modulation characteristic that is reached at modulation depths of greater than 50%. Β© 2017, Pleiades Publishing, Inc

    Устройство для пСриодичСской модуляции Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ излучСния

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    In this paper we consider a new type of mechanical device for periodic modulation of laser radiation. The modulating unit consists of two phase diffraction gratings with a rectangular profile, one of which moves relative to the other. The output beam of radiation in this device can be either a zero-order beam of diffraction, or one of the first orders of diffraction. The results of numerical simulation of output waveforms are presented. In the first order, we obtain a sinusoidal form of output power modulation with an efficiency of up to 40 percent. Optimal parameters of the phase diffraction gratings are calculated. Modulation produced in the zero order of diffraction has an impulse form with an efficiency of about 80-90 percent. The specific shape of the pulses in the zero order of diffraction depends on the distance between the two gratings. The results of numerical calculations and experimental studies are in good agreement. A special advantage of this type of modulator is the possibility of increasing the frequency of mechanical modulation of the laser beam to hundreds of kHz. The results of experimental studies of the characteristics of the scheme under consideration are presented. The device makes it possible to obtain modulation frequencies up to hundreds of kHz with a harmonic waveform in the first orders of diffraction and periodic pulses in the zero order.Π’ настоящСй Ρ€Π°Π±ΠΎΡ‚Π΅ рассматриваСтся Π½ΠΎΠ²Ρ‹ΠΉ Ρ‚ΠΈΠΏ мСханичСского устройства для пСриодичСской модуляции Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ излучСния. ΠœΠΎΠ΄ΡƒΠ»ΠΈΡ€ΡƒΡŽΡ‰ΠΈΠΉ Π±Π»ΠΎΠΊ состоит ΠΈΠ· Π΄Π²ΡƒΡ… Ρ„Π°Π·ΠΎΠ²Ρ‹Ρ… Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½Ρ‹Ρ… Ρ€Π΅ΡˆΡ‘Ρ‚ΠΎΠΊ с ΠΏΡ€ΡΠΌΠΎΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹ΠΌ ΠΏΡ€ΠΎΡ„ΠΈΠ»Π΅ΠΌ, ΠΎΠ΄Π½Π° ΠΈΠ· ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Ρ… пСрСмСщаСтся ΠΎΡ‚Π½ΠΎΡΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ Π΄Ρ€ΡƒΠ³ΠΎΠΉ. Π’Ρ‹Ρ…ΠΎΠ΄Π½Ρ‹ΠΌ ΠΏΡƒΡ‡ΠΊΠΎΠΌ излучСния Π² этом устройствС ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ Π»ΠΈΠ±ΠΎ ΠΏΡƒΡ‡ΠΎΠΊ Π½ΡƒΠ»Π΅Π²ΠΎΠ³ΠΎ порядка Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ, Π»ΠΈΠ±ΠΎ ΠΎΠ΄ΠΈΠ½ ΠΈΠ· ΠΏΠ΅Ρ€Π²Ρ‹Ρ… порядков Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ. ΠŸΡ€ΠΈΠ²ΠΎΠ΄ΡΡ‚ΡΡ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ числСнного модСлирования Ρ„ΠΎΡ€ΠΌ Π²Ρ‹Ρ…ΠΎΠ΄Π½Ρ‹Ρ… сигналов. Π’ ΠΏΠ΅Ρ€Π²ΠΎΠΌ порядкС ΠΌΡ‹ ΠΏΠΎΠ»ΡƒΡ‡Π°Π΅ΠΌ ΡΠΈΠ½ΡƒΡΠΎΠΈΠ΄Π°Π»ΡŒΠ½ΡƒΡŽ Ρ„ΠΎΡ€ΠΌΡƒ модуляции Π²Ρ‹Ρ…ΠΎΠ΄Π½ΠΎΠΉ мощности с ΡΡ„Ρ„Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒΡŽ Π΄ΠΎ 40 ΠΏΡ€ΠΎΡ†Π΅Π½Ρ‚ΠΎΠ². Рассчитаны ΠΎΠΏΡ‚ΠΈΠΌΠ°Π»ΡŒΠ½Ρ‹Π΅ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€Ρ‹ Ρ„Π°Π·ΠΎΠ²Ρ‹Ρ… Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½Ρ‹Ρ… Ρ€Π΅ΡˆΡ‘Ρ‚ΠΎΠΊ. ΠœΠΎΠ΄ΡƒΠ»ΡΡ†ΠΈΡ, производимая Π² Π½ΡƒΠ»Π΅Π²ΠΎΠΌ порядкС Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ, ΠΈΠΌΠ΅Π΅Ρ‚ ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ½ΡƒΡŽ Ρ„ΠΎΡ€ΠΌΡƒ с ΡΡ„Ρ„Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒΡŽ ΠΎΠΊΠΎΠ»ΠΎ 80-90 ΠΏΡ€ΠΎΡ†Π΅Π½Ρ‚ΠΎΠ². ΠšΠΎΠ½ΠΊΡ€Π΅Ρ‚Π½Π°Ρ Ρ„ΠΎΡ€ΠΌΠ° ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠΎΠ² Π² Π½ΡƒΠ»Π΅Π²ΠΎΠΌ порядкС Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ зависит ΠΎΡ‚ расстояния ΠΌΠ΅ΠΆΠ΄Ρƒ двумя Ρ€Π΅ΡˆΡ‘Ρ‚ΠΊΠ°ΠΌΠΈ. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ числСнных расчётов ΠΈ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… исслСдований находятся Π² Ρ…ΠΎΡ€ΠΎΡˆΠ΅ΠΌ согласии. ΠžΡΠΎΠ±Ρ‹ΠΌ прСимущСством этого Ρ‚ΠΈΠΏΠ° модулятора являСтся Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ увСличСния частоты мСханичСской модуляции Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ Π»ΡƒΡ‡Π° Π΄ΠΎ сотСн ΠΊΠ“Ρ†. ΠŸΡ€ΠΈΠ²ΠΎΠ΄ΡΡ‚ΡΡ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… исслСдований характСристик рассматриваСмой схСмы. Устройство позволяСт ΠΏΠΎΠ»ΡƒΡ‡Π°Ρ‚ΡŒ частоты модуляции Π΄ΠΎ сотСн ΠΊΠ“Ρ† с сигналом гармоничСской Ρ„ΠΎΡ€ΠΌΡ‹ Π² ΠΏΠ΅Ρ€Π²Ρ‹Ρ… порядках Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ ΠΈ пСриодичСскими ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ°ΠΌΠΈ Π² Π½ΡƒΠ»Π΅Π²ΠΎΠΌ порядкС

    Laser beam modulation using corner reflector and deep diffraction grating

    No full text
    A new scheme of the power modulator of laser beam is based on a corner-reflector unit with a relief diffraction grating that is placed on a plane of the unit and has a relief depth of several wavelengths of the laser radiation. It is shown that angular oscillations of the unit make it possible to implement modulation of the zero-order diffraction beam at a modulation depth of almost 100% and a relatively high linearity of the modulation characteristic that is reached at modulation depths of greater than 50%. Β© 2017, Pleiades Publishing, Inc

    Optical Spectral Filter Based on a Deep Periodic Relief Reflection Structure

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    Abstract: A filter based on a reflecting periodic relief diffraction structure with a relief depth of greater than one half of optical wavelength is proposed. The input-output power transfer coefficient is studied versus the optical wavelength. The filter can be configured to completely suppress radiation at a specified wavelength, and the spectral characteristic can be changed due to variation in the angle of incidence of the input beam. A method for calculation of the filter parameters is proposed, and a filter that suppresses radiation at a specified wavelength and transmits radiation at another wavelength is calculated. The filter is easy-to-implement in both visible and IR spectral ranges. Β© 2020, Pleiades Publishing, Inc

    Устройство для пСриодичСской модуляции Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ излучСния

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    In this paper we consider a new type of mechanical device for periodic modulation of laser radiation. The modulating unit consists of two phase diffraction gratings with a rectangular profile, one of which moves relative to the other. The output beam of radiation in this device can be either a zero-order beam of diffraction, or one of the first orders of diffraction. The results of numerical simulation of output waveforms are presented. In the first order, we obtain a sinusoidal form of output power modulation with an efficiency of up to 40 percent. Optimal parameters of the phase diffraction gratings are calculated. Modulation produced in the zero order of diffraction has an impulse form with an efficiency of about 80-90 percent. The specific shape of the pulses in the zero order of diffraction depends on the distance between the two gratings. The results of numerical calculations and experimental studies are in good agreement. A special advantage of this type of modulator is the possibility of increasing the frequency of mechanical modulation of the laser beam to hundreds of kHz. The results of experimental studies of the characteristics of the scheme under consideration are presented. The device makes it possible to obtain modulation frequencies up to hundreds of kHz with a harmonic waveform in the first orders of diffraction and periodic pulses in the zero order.Π’ настоящСй Ρ€Π°Π±ΠΎΡ‚Π΅ рассматриваСтся Π½ΠΎΠ²Ρ‹ΠΉ Ρ‚ΠΈΠΏ мСханичСского устройства для пСриодичСской модуляции Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ излучСния. ΠœΠΎΠ΄ΡƒΠ»ΠΈΡ€ΡƒΡŽΡ‰ΠΈΠΉ Π±Π»ΠΎΠΊ состоит ΠΈΠ· Π΄Π²ΡƒΡ… Ρ„Π°Π·ΠΎΠ²Ρ‹Ρ… Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½Ρ‹Ρ… Ρ€Π΅ΡˆΡ‘Ρ‚ΠΎΠΊ с ΠΏΡ€ΡΠΌΠΎΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹ΠΌ ΠΏΡ€ΠΎΡ„ΠΈΠ»Π΅ΠΌ, ΠΎΠ΄Π½Π° ΠΈΠ· ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Ρ… пСрСмСщаСтся ΠΎΡ‚Π½ΠΎΡΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ Π΄Ρ€ΡƒΠ³ΠΎΠΉ. Π’Ρ‹Ρ…ΠΎΠ΄Π½Ρ‹ΠΌ ΠΏΡƒΡ‡ΠΊΠΎΠΌ излучСния Π² этом устройствС ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ Π»ΠΈΠ±ΠΎ ΠΏΡƒΡ‡ΠΎΠΊ Π½ΡƒΠ»Π΅Π²ΠΎΠ³ΠΎ порядка Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ, Π»ΠΈΠ±ΠΎ ΠΎΠ΄ΠΈΠ½ ΠΈΠ· ΠΏΠ΅Ρ€Π²Ρ‹Ρ… порядков Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ. ΠŸΡ€ΠΈΠ²ΠΎΠ΄ΡΡ‚ΡΡ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ числСнного модСлирования Ρ„ΠΎΡ€ΠΌ Π²Ρ‹Ρ…ΠΎΠ΄Π½Ρ‹Ρ… сигналов. Π’ ΠΏΠ΅Ρ€Π²ΠΎΠΌ порядкС ΠΌΡ‹ ΠΏΠΎΠ»ΡƒΡ‡Π°Π΅ΠΌ ΡΠΈΠ½ΡƒΡΠΎΠΈΠ΄Π°Π»ΡŒΠ½ΡƒΡŽ Ρ„ΠΎΡ€ΠΌΡƒ модуляции Π²Ρ‹Ρ…ΠΎΠ΄Π½ΠΎΠΉ мощности с ΡΡ„Ρ„Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒΡŽ Π΄ΠΎ 40 ΠΏΡ€ΠΎΡ†Π΅Π½Ρ‚ΠΎΠ². Рассчитаны ΠΎΠΏΡ‚ΠΈΠΌΠ°Π»ΡŒΠ½Ρ‹Π΅ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€Ρ‹ Ρ„Π°Π·ΠΎΠ²Ρ‹Ρ… Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½Ρ‹Ρ… Ρ€Π΅ΡˆΡ‘Ρ‚ΠΎΠΊ. ΠœΠΎΠ΄ΡƒΠ»ΡΡ†ΠΈΡ, производимая Π² Π½ΡƒΠ»Π΅Π²ΠΎΠΌ порядкС Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ, ΠΈΠΌΠ΅Π΅Ρ‚ ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ½ΡƒΡŽ Ρ„ΠΎΡ€ΠΌΡƒ с ΡΡ„Ρ„Π΅ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒΡŽ ΠΎΠΊΠΎΠ»ΠΎ 80-90 ΠΏΡ€ΠΎΡ†Π΅Π½Ρ‚ΠΎΠ². ΠšΠΎΠ½ΠΊΡ€Π΅Ρ‚Π½Π°Ρ Ρ„ΠΎΡ€ΠΌΠ° ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠΎΠ² Π² Π½ΡƒΠ»Π΅Π²ΠΎΠΌ порядкС Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ зависит ΠΎΡ‚ расстояния ΠΌΠ΅ΠΆΠ΄Ρƒ двумя Ρ€Π΅ΡˆΡ‘Ρ‚ΠΊΠ°ΠΌΠΈ. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ числСнных расчётов ΠΈ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… исслСдований находятся Π² Ρ…ΠΎΡ€ΠΎΡˆΠ΅ΠΌ согласии. ΠžΡΠΎΠ±Ρ‹ΠΌ прСимущСством этого Ρ‚ΠΈΠΏΠ° модулятора являСтся Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ увСличСния частоты мСханичСской модуляции Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ Π»ΡƒΡ‡Π° Π΄ΠΎ сотСн ΠΊΠ“Ρ†. ΠŸΡ€ΠΈΠ²ΠΎΠ΄ΡΡ‚ΡΡ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… исслСдований характСристик рассматриваСмой схСмы. Устройство позволяСт ΠΏΠΎΠ»ΡƒΡ‡Π°Ρ‚ΡŒ частоты модуляции Π΄ΠΎ сотСн ΠΊΠ“Ρ† с сигналом гармоничСской Ρ„ΠΎΡ€ΠΌΡ‹ Π² ΠΏΠ΅Ρ€Π²Ρ‹Ρ… порядках Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ ΠΈ пСриодичСскими ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠ°ΠΌΠΈ Π² Π½ΡƒΠ»Π΅Π²ΠΎΠΌ порядкС

    ΠžΠΏΡ‚ΠΈΡ‡Π΅ΡΠΊΠΈΠΉ Ρ„ΠΈΠ»ΡŒΡ‚Ρ€, построСнный с ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π³Π»ΡƒΠ±ΠΎΠΊΠΎΠΉ пСриодичСской ΠΎΡ‚Ρ€Π°ΠΆΠ°ΡŽΡ‰Π΅ΠΉ Ρ€Π΅Π»ΡŒΠ΅Ρ„Π½ΠΎΠΉ структуры

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    An optical scheme intended for filtering the wavelength spectrum of an optical signal is proposed and investigated. The filter scheme uses a relief reflecting periodic diffraction structure with a relief depth of more than half the wavelength. The input optical beam is directed to the diffraction structure at an angle. The plane of incidence is parallel to the lines of the diffraction structure. A zero-order beam of diffraction is output. The dependence of the power transfer coefficient from the input to the output on the wavelength of the emission has zeros and maxima at certain wavelengths. The transmission coefficient at maxima is close to unity. The filter can be configured to completely suppress any selected wavelength and is easily reconfigured by changing the angle of incidence of the input beam. A technique for calculating filter parameters is described. Examples of calculation of a filter for suppressing one of the spectral emission lines of an argon laser are given, provided that another strong spectral line is passed. The filter is equally simple for practical implementation in both the visible and infrared ranges.Π’ схСмС Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π° ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½Π° глубокая Ρ€Π΅Π»ΡŒΠ΅Ρ„Π½Π°Ρ ΠΎΡ‚Ρ€Π°ΠΆΠ°ΡŽΡ‰Π°Ρ пСриодичСская дифракционная структура (Π“Π Π‘) с Π³Π»ΡƒΠ±ΠΈΠ½ΠΎΠΉ ΠΏΡ€ΡΠΌΠΎΡƒΠ³ΠΎΠ»ΡŒΠ½ΠΎΠ³ΠΎ Ρ€Π΅Π»ΡŒΠ΅Ρ„Π° Π±ΠΎΠ»Π΅Π΅ ΠΏΠΎΠ»ΠΎΠ²ΠΈΠ½Ρ‹ Π΄Π»ΠΈΠ½Ρ‹ Π²ΠΎΠ»Π½Ρ‹. Π’Ρ…ΠΎΠ΄Π½ΠΎΠΉ оптичСский ΠΏΡƒΡ‡ΠΎΠΊ направляСтся Π½Π° Π“Π Π‘ ΠΏΠΎΠ΄ ΡƒΠ³Π»ΠΎΠΌ. ΠŸΠ»ΠΎΡΠΊΠΎΡΡ‚ΡŒ падСния ΠΏΠ°Ρ€Π°Π»Π»Π΅Π»ΡŒΠ½Π° линиям Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½ΠΎΠΉ структуры. ΠŸΡƒΡ‡ΠΎΠΊ Π½ΡƒΠ»Π΅Π²ΠΎΠ³ΠΎ порядка Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΈ являСтся Π²Ρ‹Ρ…ΠΎΠ΄Π½Ρ‹ΠΌ. Π—Π°Π²ΠΈΡΠΈΠΌΠΎΡΡ‚ΡŒ коэффициСнта ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‡ΠΈ мощности с Π²Ρ…ΠΎΠ΄Π° Π½Π° Π²Ρ‹Ρ…ΠΎΠ΄ ΠΎΡ‚ Π΄Π»ΠΈΠ½Ρ‹ Π²ΠΎΠ»Π½Ρ‹ излучСния ΠΈΠΌΠ΅Π΅Ρ‚ Π½ΡƒΠ»ΠΈ ΠΈ максимумы Π½Π° ΠΎΠΏΡ€Π΅Π΄Π΅Π»Ρ‘Π½Π½Ρ‹Ρ… Π΄Π»ΠΈΠ½Π°Ρ… Π²ΠΎΠ»Π½. Π€ΠΈΠ»ΡŒΡ‚Ρ€ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ настроСн Π½Π° ΠΏΠΎΠ»Π½ΠΎΠ΅ ΠΏΠΎΠ΄Π°Π²Π»Π΅Π½ΠΈΠ΅ любой Π²Ρ‹Π±Ρ€Π°Π½Π½ΠΎΠΉ Π΄Π»ΠΈΠ½Ρ‹ Π²ΠΎΠ»Π½Ρ‹ ΠΈ Π»Π΅Π³ΠΊΠΎ пСрСстраиваСтся Π·Π° счёт измСнСния ΡƒΠ³Π»Π° падСния Π²Ρ…ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΏΡƒΡ‡ΠΊΠ°. ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½Ρ‹ ΠΏΡ€ΠΈΠΌΠ΅Ρ€Ρ‹ расчёта Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π° для подавлСния ΠΎΠ΄Π½ΠΎΠΉ ΠΈΠ· ΡΠΏΠ΅ΠΊΡ‚Ρ€Π°Π»ΡŒΠ½Ρ‹Ρ… Π»ΠΈΠ½ΠΈΠΉ излучСния Π°Ρ€Π³ΠΎΠ½ΠΎΠ²ΠΎΠ³ΠΎ Π»Π°Π·Π΅Ρ€Π° ΠΏΡ€ΠΈ условии пропускания Π΄Ρ€ΡƒΠ³ΠΎΠΉ ΡΠΏΠ΅ΠΊΡ‚Ρ€Π°Π»ΡŒΠ½ΠΎΠΉ Π»ΠΈΠ½ΠΈΠΈ. Π€ΠΈΠ»ΡŒΡ‚Ρ€ ΠΎΠ΄ΠΈΠ½Π°ΠΊΠΎΠ²ΠΎ прост для практичСской Ρ€Π΅Π°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ ΠΊΠ°ΠΊ Π² Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌ, Ρ‚Π°ΠΊ ΠΈ инфракрасном Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½

    НовыС оптоэлСкторнныС схСмы, построСнныС Π½Π° основС Ρ€Π΅Π»ΡŒΠ΅Ρ„Π½Ρ‹Ρ… ΠΎΡ‚Ρ€Π°ΠΆΠ°ΡŽΡ‰ΠΈΡ… Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½Ρ‹Ρ… структур с ΠΏΡ€ΡΠΌΠΎΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹ΠΌ ΠΏΡ€ΠΎΡ„ΠΈΠ»Π΅ΠΌ

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    The article describes a number of new schemes designed to measure small angular displacements and oscillations, to modulate laser radiation, and also to filter the spectrum of optical radiation in the visible and infrared wavelengths. The operation of these schemes is based on the effects observed when a laser beam is reflected from deep diffractive relief structures with a rectangular profile, with a relief depth from a quarter of the wavelength to several wavelengths due to laser radiation. The applications of these devices are varied. For example, sensors of small angular displacements and vibrations can be used in the study of vibrations and in the design of seismometers and tiltmeters. A mechanically driven modulator operates in the low-frequency modulation region, but can provide analogue modulation of the radiation power with different modulation depths from zero to one hundred percent. Optical filters built on the basis of deep relief reflective structures have oscillating dependences of the transmission coefficient on the wavelength. It is possible to select parameters in such a way that the filter has a zero transmission coefficient at a given wavelength and a transmission coefficient close to unity in another given area. The advantages of a filter of this type can be attributed simply to its production and the possibility of realigning the spectral characteristics of the filter within wide limits.Π’ ΡΡ‚Π°Ρ‚ΡŒΠ΅ рассмотрСн ряд Π½ΠΎΠ²Ρ‹Ρ… схСм, ΠΏΡ€Π΅Π΄Π½Π°Π·Π½Π°Ρ‡Π΅Π½Π½Ρ‹Ρ… для измСрСния ΠΌΠ°Π»Ρ‹Ρ… ΡƒΠ³Π»ΠΎΠ²Ρ‹Ρ… смСщСний ΠΈ ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ, для модуляции Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ излучСния, Π° Ρ‚Π°ΠΊΠΆΠ΅ для Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π°Ρ†ΠΈΠΈ спСктра оптичСского излучСния Π² Π²ΠΈΠ΄ΠΈΠΌΠΎΠΌ ΠΈ Π² инфракрасном Π΄ΠΈΠ°ΠΏΠ°Π·ΠΎΠ½Π΅ Π΄Π»ΠΈΠ½ Π²ΠΎΠ»Π½. Π’ основС Ρ€Π°Π±ΠΎΡ‚Ρ‹ этих схСм Π»Π΅ΠΆΠ°Ρ‚ эффСкты, Π½Π°Π±Π»ΡŽΠ΄Π°Π΅ΠΌΡ‹Π΅ ΠΏΡ€ΠΈ ΠΎΡ‚Ρ€Π°ΠΆΠ΅Π½ΠΈΠΈ Π»Π°Π·Π΅Ρ€Π½ΠΎΠ³ΠΎ ΠΏΡƒΡ‡ΠΊΠ° ΠΎΡ‚ Π³Π»ΡƒΠ±ΠΎΠΊΠΈΡ… Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½Ρ‹Ρ… Ρ€Π΅Π»ΡŒΠ΅Ρ„Π½Ρ‹Ρ… структур, ΠΈΠΌΠ΅ΡŽΡ‰ΠΈΡ… ΠΏΡ€ΡΠΌΠΎΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹ΠΉ ΠΏΡ€ΠΎΡ„ΠΈΠ»ΡŒ, с Π³Π»ΡƒΠ±ΠΈΠ½ΠΎΠΉ Ρ€Π΅Π»ΡŒΠ΅Ρ„Π° ΠΎΡ‚ Ρ‡Π΅Ρ‚Π²Π΅Ρ€Ρ‚ΠΈ Π΄Π»ΠΈΠ½Ρ‹ Π²ΠΎΠ»Π½Ρ‹ Π΄ΠΎ Π½Π΅ΡΠΊΠΎΠ»ΡŒΠΊΠΈΡ… Π΄Π»ΠΈΠ½ Π²ΠΎΠ»Π½ излучСния Π»Π°Π·Π΅Ρ€Π°. ΠžΠ±Π»Π°ΡΡ‚ΠΈ ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠΉ этих устройств Ρ€Π°Π·Π½ΠΎΠΎΠ±Ρ€Π°Π·Π½Ρ‹. НапримСр, Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠΈ ΠΌΠ°Π»Ρ‹Ρ… ΡƒΠ³Π»ΠΎΠ²Ρ‹Ρ… смСщСний ΠΈ ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ ΠΌΠΎΠ³ΡƒΡ‚ Π±Ρ‹Ρ‚ΡŒ ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½Ρ‹ ΠΏΡ€ΠΈ исслСдовании Π²ΠΈΠ±Ρ€Π°Ρ†ΠΈΠΉ ΠΈ ΠΏΡ€ΠΈ конструировании сСйсмомСтров ΠΈ Π½Π°ΠΊΠ»ΠΎΠ½ΠΎΠΌΠ΅Ρ€ΠΎΠ². ΠœΠΎΠ΄ΡƒΠ»ΡΡ‚ΠΎΡ€ с мСханичСским ΠΏΡ€ΠΈΠ²ΠΎΠ΄ΠΎΠΌ Ρ€Π°Π±ΠΎΡ‚Π°Π΅Ρ‚ Π² области Π½ΠΈΠ·ΠΊΠΈΡ… частот модуляции, Π½ΠΎ ΠΌΠΎΠΆΠ΅Ρ‚ ΠΎΠ±Π΅ΡΠΏΠ΅Ρ‡ΠΈΡ‚ΡŒ Π°Π½Π°Π»ΠΎΠ³ΠΎΠ²ΡƒΡŽ ΠΌΠΎΠ΄ΡƒΠ»ΡΡ†ΠΈΡŽ мощности излучСния с Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹ΠΌΠΈ Π³Π»ΡƒΠ±ΠΈΠ½Π°ΠΌΠΈ модуляции ΠΎΡ‚ нуля Π΄ΠΎ ста ΠΏΡ€ΠΎΡ†Π΅Π½Ρ‚ΠΎΠ². ΠžΠΏΡ‚ΠΈΡ‡Π΅ΡΠΊΠΈΠ΅ Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Ρ‹, построСнныС Π½Π° основС Π³Π»ΡƒΠ±ΠΎΠΊΠΈΡ… Ρ€Π΅Π»ΡŒΠ΅Ρ„Π½Ρ‹Ρ… ΠΎΡ‚Ρ€Π°ΠΆΠ°ΡŽΡ‰ΠΈΡ… структур, ΠΈΠΌΠ΅ΡŽΡ‚ ΠΎΡΡ†ΠΈΠ»Π»ΠΈΡ€ΡƒΡŽΡ‰ΠΈΠ΅ зависимости коэффициСнта ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‡ΠΈ ΠΎΡ‚ Π΄Π»ΠΈΠ½Ρ‹ Π²ΠΎΠ»Π½Ρ‹. МоТно Π²Ρ‹Π±Ρ€Π°Ρ‚ΡŒ ΠΏΠ°Ρ€Π°ΠΌΠ΅Ρ‚Ρ€Ρ‹ Ρ‚Π°ΠΊΠΈΠΌ ΠΎΠ±Ρ€Π°Π·ΠΎΠΌ, Ρ‡Ρ‚ΠΎΠ±Ρ‹ Ρ„ΠΈΠ»ΡŒΡ‚Ρ€ ΠΈΠΌΠ΅Π» Π½ΡƒΠ»Π΅Π²ΠΎΠΉ коэффициСнт ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‡ΠΈ Π½Π° Π·Π°Π΄Π°Π½Π½ΠΎΠΉ Π΄Π»ΠΈΠ½Π΅ Π²ΠΎΠ»Π½Ρ‹ ΠΈ Π±Π»ΠΈΠ·ΠΊΠΈΠΉ ΠΊ Π΅Π΄ΠΈΠ½ΠΈΡ†Π΅ коэффициСнт ΠΏΠ΅Ρ€Π΅Π΄Π°Ρ‡ΠΈ Π² Π΄Ρ€ΡƒΠ³ΠΎΠΉ Π·Π°Π΄Π°Π½Π½ΠΎΠΉ области. К достоинствам Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π° Π΄Π°Π½Π½ΠΎΠ³ΠΎ Ρ‚ΠΈΠΏΠ° ΠΌΠΎΠΆΠ½ΠΎ отнСсти простоту Π΅Π³ΠΎ изготовлСния ΠΈ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ пСрСстройки ΡΠΏΠ΅ΠΊΡ‚Ρ€Π°Π»ΡŒΠ½ΠΎΠΉ характСристики Ρ„ΠΈΠ»ΡŒΡ‚Ρ€Π° Π² ΡˆΠΈΡ€ΠΎΠΊΠΈΡ… ΠΏΡ€Π΅Π΄Π΅Π»Π°Ρ…

    ΠœΠ°ΠΊΠ΅Ρ‚ сСйсмомСтра с ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠ° Π½Π° основС Π³Π»ΡƒΠ±ΠΎΠΊΠΎΠΉ ΠΎΡ‚Ρ€Π°ΠΆΠ°ΡŽΡ‰Π΅ΠΉ Ρ„Π°Π·ΠΎΠ²ΠΎΠΉ Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½ΠΎΠΉ Ρ€Π΅ΡˆΠ΅Ρ‚ΠΊΠΈ

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    The new type of the device for measuring seismics is developed and tested. The vibration sensor unit is built on the base of a corner reflector and a deep phase diffraction grating with a rectangular profile. The article shows the scheme of the device, describes the principle of its operation.Π Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π° ΠΈ испытана схСма ΠΏΡ€ΠΈΠ±ΠΎΡ€Π°, ΠΏΡ€Π΅Π΄Π½Π°Π·Π½Π°Ρ‡Π΅Π½Π½ΠΎΠ³ΠΎ для измСрСния ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ Π·Π΅ΠΌΠ½ΠΎΠΉ повСрхности. Π‘Π»ΠΎΠΊ Π΄Π°Ρ‚Ρ‡ΠΈΠΊΠ° ΠΊΠΎΠ»Π΅Π±Π°Π½ΠΈΠΉ построСн Π½Π° основС ΡƒΠ³ΠΎΠ»ΠΊΠΎΠ²ΠΎΠ³ΠΎ отраТатСля ΠΈ Π³Π»ΡƒΠ±ΠΎΠΊΠΎΠΉ Ρ„Π°Π·ΠΎΠ²ΠΎΠΉ Π΄ΠΈΡ„Ρ€Π°ΠΊΡ†ΠΈΠΎΠ½Π½ΠΎΠΉ Ρ€Π΅ΡˆΠ΅Ρ‚ΠΊΠΈ с ΠΏΡ€ΡΠΌΠΎΡƒΠ³ΠΎΠ»ΡŒΠ½Ρ‹ΠΌ ΠΏΡ€ΠΎΡ„ΠΈΠ»Π΅ΠΌ. Π’ ΡΡ‚Π°Ρ‚ΡŒΠ΅ ΠΏΡ€ΠΈΠ²Π΅Π΄Π΅Π½Π° схСма устройства, описан ΠΏΡ€ΠΈΠ½Ρ†ΠΈΠΏ Π΅Π³ΠΎ Ρ€Π°Π±ΠΎΡ‚Ρ‹
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