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Quantitative force measurements with optical tweezers: The JPK
... diffraction effects can be neglected and the trapping forces of the light can be understood in terms of ray optics. The regime where d<<λ is called the Rayleigh regime. In this case, the trapped particles can be treated as point dipoles, as the electromagnetic field is constant on the scale of the p ...
... diffraction effects can be neglected and the trapping forces of the light can be understood in terms of ray optics. The regime where d<<λ is called the Rayleigh regime. In this case, the trapped particles can be treated as point dipoles, as the electromagnetic field is constant on the scale of the p ...
Broadband Semiconductor Light Source for Optical Sensing
... In optical sensing, a broadband spectrum light source which is capable of emitting light of different wavelengths is used in order to increase the amount of data from the object. Although there are a variety of broadband spectrum light sources, optical semiconductor devices are accepted as a promisi ...
... In optical sensing, a broadband spectrum light source which is capable of emitting light of different wavelengths is used in order to increase the amount of data from the object. Although there are a variety of broadband spectrum light sources, optical semiconductor devices are accepted as a promisi ...
Photodetecting Fiber Webs—Y. Fink, J. Joannopoulos
... hollow core. Hollow core guiding versions of these fibers have recently been successfully fabricated, with fundamental photonic bandgaps at 3 and 10.6 µm wavelength. While those wavelengths may be used for high-energy laser delivery, it is also of interest to explore the usage of these fibers at nea ...
... hollow core. Hollow core guiding versions of these fibers have recently been successfully fabricated, with fundamental photonic bandgaps at 3 and 10.6 µm wavelength. While those wavelengths may be used for high-energy laser delivery, it is also of interest to explore the usage of these fibers at nea ...
Costas-Loop Based Carrier Recovery in Optical Coherent Intersatellite Communications Systems Semjon Schaefer
... numerical approximation is required in order to investigate the nonlinear behaviour. A common graphical method to investigate this approximation of the nonlinear PLL is the phase plane diagram. This diagram shows the frequency error d dt depending on the phase error . The phase error is wrap ...
... numerical approximation is required in order to investigate the nonlinear behaviour. A common graphical method to investigate this approximation of the nonlinear PLL is the phase plane diagram. This diagram shows the frequency error d dt depending on the phase error . The phase error is wrap ...
PDF
... is typically greater than 0.5 dB/lm at telecommunications wavelengths (k ¼ 1.55 lm).8 This combination of high mode confinement and large propagation loss in SPPs makes it challenging to integrate them with existing semiconductor waveguide devices, such as lasers, modulators, and detectors. Though ...
... is typically greater than 0.5 dB/lm at telecommunications wavelengths (k ¼ 1.55 lm).8 This combination of high mode confinement and large propagation loss in SPPs makes it challenging to integrate them with existing semiconductor waveguide devices, such as lasers, modulators, and detectors. Though ...
EE 230: Optical Fiber Communication Lecture 7
... Energy levels 1 and 2 and their decay times. By means of pumping, the population density of level 2 is increased at the rate R2 while that of level 1 is decreased at the rate R1 For large DN or No (also called inversion density) We want t2 long, but t21 not too small, t1 and R1 large ...
... Energy levels 1 and 2 and their decay times. By means of pumping, the population density of level 2 is increased at the rate R2 while that of level 1 is decreased at the rate R1 For large DN or No (also called inversion density) We want t2 long, but t21 not too small, t1 and R1 large ...
Structure of Optical Vortices
... FIG. 3: Time required for colloidal sphere to complete one circuit of an optical vortex. Dashed curves indicate scaling predicted by Eq. (6); Solid curves result from fits to Eqs. (12) and (13). (a) Dependence of T` (P ) on topological charge for P = 500 mW. Inset: corrugated intensity distribution ...
... FIG. 3: Time required for colloidal sphere to complete one circuit of an optical vortex. Dashed curves indicate scaling predicted by Eq. (6); Solid curves result from fits to Eqs. (12) and (13). (a) Dependence of T` (P ) on topological charge for P = 500 mW. Inset: corrugated intensity distribution ...
High-Repetition TDS System
... optical pulse with the two-photon absorption type autocorrelator and a spectrum analyzer. Figure 5 shows the autocorrelation trace and spectrum of the seed pulse light on the SMF output terminal. The frequency of the modulation signal input to the MZM was 10 GHz. As indicated in Fig. 3 (b), we obtai ...
... optical pulse with the two-photon absorption type autocorrelator and a spectrum analyzer. Figure 5 shows the autocorrelation trace and spectrum of the seed pulse light on the SMF output terminal. The frequency of the modulation signal input to the MZM was 10 GHz. As indicated in Fig. 3 (b), we obtai ...
IOSR Journal of Applied Physics (IOSR-JAP)
... energy of the deposited films was found to be 1.25-1.35eV. All these desirable properties made the semiconductor material a good candidate for applications in photonics and photovoltaic devices fabrication. Key words:Thin films, absorbance, reflectance, transmittance, optical conductivity, refractiv ...
... energy of the deposited films was found to be 1.25-1.35eV. All these desirable properties made the semiconductor material a good candidate for applications in photonics and photovoltaic devices fabrication. Key words:Thin films, absorbance, reflectance, transmittance, optical conductivity, refractiv ...
Characterization of proton-exchanged waveguides in
... in the x-cut orientation for the doped material. This result is similar to the situation in Ti-diffused LiNbO 3 , where the presence of Ti slows down the proton-exchange rate. 8 Note that the exchange rate is still very high with melts containing up to 1% of lithium benzoate; a single-mode waveguide ...
... in the x-cut orientation for the doped material. This result is similar to the situation in Ti-diffused LiNbO 3 , where the presence of Ti slows down the proton-exchange rate. 8 Note that the exchange rate is still very high with melts containing up to 1% of lithium benzoate; a single-mode waveguide ...
Cost-effective optical coherence tomography spectrometer based on
... optical optimization the device can be fitted into a 200×60×10 mm format after removal of unnecessary optical surfaces using only standard components. To reduce the depth dependent signal loss which is caused by the limited spectral resolution an increase of the numerical aperture is necessary. This ...
... optical optimization the device can be fitted into a 200×60×10 mm format after removal of unnecessary optical surfaces using only standard components. To reduce the depth dependent signal loss which is caused by the limited spectral resolution an increase of the numerical aperture is necessary. This ...
Silica-Based Highly Nonlinear Fibers and Their Applications
... combs are not a new research area, applications to multiwavelength signal sources for high-capacity wavelength division multiplexing (WDM) optical communication systems and applications to the exoplanet surveys in astronomy have been actively studied in recent years. For a multi-wavelength signal so ...
... combs are not a new research area, applications to multiwavelength signal sources for high-capacity wavelength division multiplexing (WDM) optical communication systems and applications to the exoplanet surveys in astronomy have been actively studied in recent years. For a multi-wavelength signal so ...
A Laser Module for 100Gbps Digital Coherent Optical Transmission System
... order to simultaneously realize a linewidth of no more than 500 kHz and high optical output, we used a long DFB LD cavity that has a length of 1.2 mm, and also optimally designed the shape of the waveguide of the SOA. Figure 4 shows the dependency of the output power of the optical fiber to which th ...
... order to simultaneously realize a linewidth of no more than 500 kHz and high optical output, we used a long DFB LD cavity that has a length of 1.2 mm, and also optimally designed the shape of the waveguide of the SOA. Figure 4 shows the dependency of the output power of the optical fiber to which th ...
5 - www2
... the light suffers total reflection in the waveguide, it still does penetrate the neighboring medium in a depth commeasurable with the wavelength. The observation follows from the quantum nature of the light-matter interaction (let’s think about the tunneling effect that is based on this feature, as ...
... the light suffers total reflection in the waveguide, it still does penetrate the neighboring medium in a depth commeasurable with the wavelength. The observation follows from the quantum nature of the light-matter interaction (let’s think about the tunneling effect that is based on this feature, as ...
Tailoring repulsive optical forces in nanophotonic waveguides
... We describe a mechanism and propose design strategies to selectively tailor repulsive–gradient-optical forces between parallel, nanophotonic waveguides via morphology augmented by slow-light band-edge modes. We show that at small separation lengths, the repulsive force can be made nearly 2 orders of ...
... We describe a mechanism and propose design strategies to selectively tailor repulsive–gradient-optical forces between parallel, nanophotonic waveguides via morphology augmented by slow-light band-edge modes. We show that at small separation lengths, the repulsive force can be made nearly 2 orders of ...
LEONI Fiber Optics
... technology. With glass or plastic fibers also for lighting and decoration. ■■ One common fiber bundle and several individual fiber bundles as passive light-guide channels ■■ Individual fibers made from optical glass (when transmitting visible light) or quartz (when transmitting UV/IR light) ■■ Prote ...
... technology. With glass or plastic fibers also for lighting and decoration. ■■ One common fiber bundle and several individual fiber bundles as passive light-guide channels ■■ Individual fibers made from optical glass (when transmitting visible light) or quartz (when transmitting UV/IR light) ■■ Prote ...
Scanning Tunneling Microscopy
... resolve would be directly proportional to the wavelength of the light shining on the object, and inversely proportional to the sine of the index of refraction of material from which the microscope’s lenses was made. Abbe’s limit implies that even the best optical microscope will be unable to distin ...
... resolve would be directly proportional to the wavelength of the light shining on the object, and inversely proportional to the sine of the index of refraction of material from which the microscope’s lenses was made. Abbe’s limit implies that even the best optical microscope will be unable to distin ...
Bimodal optical computers
... optics is known to excel over electronics. In this paper we offer a limited exploration of a proposed link between these two fields of optics. That is, we will discuss hybrid optical numerical processors. We seek the numerical accuracy of digital computing while still retaining some of the speed and ...
... optics is known to excel over electronics. In this paper we offer a limited exploration of a proposed link between these two fields of optics. That is, we will discuss hybrid optical numerical processors. We seek the numerical accuracy of digital computing while still retaining some of the speed and ...
Silicon photonics
Silicon photonics is the study and application of photonic systems which use silicon as an optical medium. The silicon is usually patterned with sub-micrometre precision, into microphotonic components. These operate in the infrared, most commonly at the 1.55 micrometre wavelength used by most fiber optic telecommunication systems. The silicon typically lies on top of a layer of silica in what (by analogy with a similar construction in microelectronics) is known as silicon on insulator (SOI).Silicon photonic devices can be made using existing semiconductor fabrication techniques, and because silicon is already used as the substrate for most integrated circuits, it is possible to create hybrid devices in which the optical and electronic components are integrated onto a single microchip. Consequently, silicon photonics is being actively researched by many electronics manufacturers including IBM and Intel, as well as by academic research groups such as that of Prof. Michal Lipson, who see it is a means for keeping on track with Moore's Law, by using optical interconnects to provide faster data transfer both between and within microchips.The propagation of light through silicon devices is governed by a range of nonlinear optical phenomena including the Kerr effect, the Raman effect, two photon absorption and interactions between photons and free charge carriers. The presence of nonlinearity is of fundamental importance, as it enables light to interact with light, thus permitting applications such as wavelength conversion and all-optical signal routing, in addition to the passive transmission of light.Silicon waveguides are also of great academic interest, due to their ability to support exotic nonlinear optical phenomena such as soliton propagation.