Laser III - Universiti Sains Malaysia
... For significant gain, a high current density is necessary. The onset of lasing is characterised by the a specific injection current known as the Threshold Current Since the simple homojunction laser has high threshold current, it is considered not efficient. The onset of laser action at the threshol ...
... For significant gain, a high current density is necessary. The onset of lasing is characterised by the a specific injection current known as the Threshold Current Since the simple homojunction laser has high threshold current, it is considered not efficient. The onset of laser action at the threshol ...
Synopsis by Shawn Miller
... optical element are driven backwards similar results are found, and the system hysteresis effect is found to be 1.71%. See Figure 6. Comparison This is better performance than can be achieved by the best conventional steppermotor-driven rotation stage. (Golnabi) The typical resolution for a manual r ...
... optical element are driven backwards similar results are found, and the system hysteresis effect is found to be 1.71%. See Figure 6. Comparison This is better performance than can be achieved by the best conventional steppermotor-driven rotation stage. (Golnabi) The typical resolution for a manual r ...
![r - Nano[studijní] materiály - Technical University of Liberec](http://s1.studyres.com/store/data/007925985_1-5e55f54db686ed86c2131eb21f7dd098-300x300.png)
r - Nano[studijní] materiály - Technical University of Liberec
... Šíření optické vlny krystalem ...
... Šíření optické vlny krystalem ...
Optics and Quantum Electronics E. P. Ippen
... the optical carrier relative to the peak of the intensity envelope in ultrashort pulses. This is made possible by first generating sub-two cycle pulses with octave spanning spectra directly from a Ti:sapphire laser oscillator [1]. Detection of the carrier-envelope phase is then achieved by focusing ...
... the optical carrier relative to the peak of the intensity envelope in ultrashort pulses. This is made possible by first generating sub-two cycle pulses with octave spanning spectra directly from a Ti:sapphire laser oscillator [1]. Detection of the carrier-envelope phase is then achieved by focusing ...
Spontaneous emission of a cesium atom near a nanofiber: Efficient
... the spontaneous emission process. We find that different magnetic sublevels have different decay rates. We demonstrate that the thin fiber can indeed act as a subwavelength probe, since about one fourth of the spontaneous emission from the atom can be channeled into guided modes. The knowledge of sp ...
... the spontaneous emission process. We find that different magnetic sublevels have different decay rates. We demonstrate that the thin fiber can indeed act as a subwavelength probe, since about one fourth of the spontaneous emission from the atom can be channeled into guided modes. The knowledge of sp ...
Heterogenously integrated InP on Si microdisk lasers
... transmission medium and heterogeneously integrated detectors. Although one could also use Gedetectors, we have chosen for an approach with III-V detectors. As explained in [9], one can even use identical microdisk structures for both the transmitter and the detector, although the detectors are not w ...
... transmission medium and heterogeneously integrated detectors. Although one could also use Gedetectors, we have chosen for an approach with III-V detectors. As explained in [9], one can even use identical microdisk structures for both the transmitter and the detector, although the detectors are not w ...
Program Overview Erich Ippen
... • Excite 1S→2S transition (known to about 1 part in 1014.) • Lock 486 nm laser to 1S→2S • Excite two-photon transition such as 2S→10S • Measure excitation frequencies with an optical frequency comb, referenced to the 486 nm laser, i.e. referenced to hydrogen ...
... • Excite 1S→2S transition (known to about 1 part in 1014.) • Lock 486 nm laser to 1S→2S • Excite two-photon transition such as 2S→10S • Measure excitation frequencies with an optical frequency comb, referenced to the 486 nm laser, i.e. referenced to hydrogen ...
Wavelength Converters in Optical Communication Systems
... wavelength to another without entering the electrical domain. A simple technique for the realization of this function is the use of cross gain modulation (XGM) in semiconductor optical amplifiers (SOA’s). The principle is depicted in Fig. 3.4.1(a)[9] [11] showing an intensity modulated input signal ...
... wavelength to another without entering the electrical domain. A simple technique for the realization of this function is the use of cross gain modulation (XGM) in semiconductor optical amplifiers (SOA’s). The principle is depicted in Fig. 3.4.1(a)[9] [11] showing an intensity modulated input signal ...
Three key regimes of single pulse generation per round trip of all
... paper [4] reports for the first time lasing in a hybrid (consisting of both bulk elements and fiber sections) 3.8-km-long mode-lock master oscillator with pulse energy as high as 3.9 μJ. Recent experiments with all-normal-dispersion NPE mode-locked lasers both with short and long cavities show a lar ...
... paper [4] reports for the first time lasing in a hybrid (consisting of both bulk elements and fiber sections) 3.8-km-long mode-lock master oscillator with pulse energy as high as 3.9 μJ. Recent experiments with all-normal-dispersion NPE mode-locked lasers both with short and long cavities show a lar ...
An Optical ‘‘Janus’’ Device for Integrated Photonics By Xiang Zhang*
... devices, they have to be comparable in size to conventional electronic components and compatible with standard semiconductor fabrication technologies. Although, there has been tremendous progress in integrated photonics to enable light propagation on a wavelength scale,[30] the footprint of many fun ...
... devices, they have to be comparable in size to conventional electronic components and compatible with standard semiconductor fabrication technologies. Although, there has been tremendous progress in integrated photonics to enable light propagation on a wavelength scale,[30] the footprint of many fun ...
Hyperbolic Secant Squared Pulse Shape
... Because ultrashort pulses are so broadband, this distortion is very noticeable—and problematic! ...
... Because ultrashort pulses are so broadband, this distortion is very noticeable—and problematic! ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... transmission systems has brought out the necessity of increasing the spectral efficiency by employing different transmission techniques and also increasing transmission speed in optical networks. One optical technique used to improve the efficiency of optical communication systems is polarization di ...
... transmission systems has brought out the necessity of increasing the spectral efficiency by employing different transmission techniques and also increasing transmission speed in optical networks. One optical technique used to improve the efficiency of optical communication systems is polarization di ...
Welcome to BME 495: Advanced Physical and Applied Optics
... – Lecture 7: Multiple Light Scattering and Propagation in Random Media (Liouville-Neumann series, Rytov series, Transport theory, Two-flux approximation, approximations to the transport equation: diffusion approximation, delta-Eddington approximation, P-3 approximation) III. Applied Physical Optics ...
... – Lecture 7: Multiple Light Scattering and Propagation in Random Media (Liouville-Neumann series, Rytov series, Transport theory, Two-flux approximation, approximations to the transport equation: diffusion approximation, delta-Eddington approximation, P-3 approximation) III. Applied Physical Optics ...
II. Semiconductor optical amplifier
... effect of the single SOA in the same power setting but different bandwidth and offset spacing. The BER for all-optical logic gates is produced in the same power setting, an AND gate is the best logic gate at10-9 but beyond 10-12 it is not good. All-optical logic gates (AND, OR, XOR) are demonstrated ...
... effect of the single SOA in the same power setting but different bandwidth and offset spacing. The BER for all-optical logic gates is produced in the same power setting, an AND gate is the best logic gate at10-9 but beyond 10-12 it is not good. All-optical logic gates (AND, OR, XOR) are demonstrated ...
Silicon Photonics Optical Transceiver for High-speed, High
... The next-generation servers and supercomputers with high performance and low power consumption require not only CPUs with an enhanced processing capability, but also signal transmission technology that connects CPUs with other CPUs or memories at high density and low power. It is becoming difficult ...
... The next-generation servers and supercomputers with high performance and low power consumption require not only CPUs with an enhanced processing capability, but also signal transmission technology that connects CPUs with other CPUs or memories at high density and low power. It is becoming difficult ...
Rayleigh Noise Mitigated 70-km-Reach Bi-directional WDM-PON with 10-Gb/s Directly Modulated Manchester-
... gaining attention because it is capable of linking the end customers directly to the core networks, thus further reduces the bandwidth transport costs [2]. Therefore, it is desirable to develop CLS long-reach bi-directional WDMPON with cost-effective components. In such single-fiber full-duplex wave ...
... gaining attention because it is capable of linking the end customers directly to the core networks, thus further reduces the bandwidth transport costs [2]. Therefore, it is desirable to develop CLS long-reach bi-directional WDMPON with cost-effective components. In such single-fiber full-duplex wave ...
total internal reflection
... is observed that all the light is reflected back into the water. This phenomenon is referred to as total internal reflection. The critical angle for total internal reflection can be found by sin c = n2/n1. Total internal reflection can only occur on the side of an interface that has the greater ind ...
... is observed that all the light is reflected back into the water. This phenomenon is referred to as total internal reflection. The critical angle for total internal reflection can be found by sin c = n2/n1. Total internal reflection can only occur on the side of an interface that has the greater ind ...
Practical Guide to Specifying Optical Components
... This paper is intended to serve as a practical guide for specifying and tolerancing optical components. The information contained is by no means all inclusive. Rather, it is an overview of the relevant standards (specifically ISO 10110) and provides qualitative descriptions of the various optical sp ...
... This paper is intended to serve as a practical guide for specifying and tolerancing optical components. The information contained is by no means all inclusive. Rather, it is an overview of the relevant standards (specifically ISO 10110) and provides qualitative descriptions of the various optical sp ...
Introduction to Fiber Optics
... continuum—an electromagnetic wave. On the other hand, when studying the interaction of light with semiconductors, as in sources and detectors, the quantum physics approach is taken. The wave versus particle dilemma can be addressed in a more formal way, but that is beyond the scope of this text. It ...
... continuum—an electromagnetic wave. On the other hand, when studying the interaction of light with semiconductors, as in sources and detectors, the quantum physics approach is taken. The wave versus particle dilemma can be addressed in a more formal way, but that is beyond the scope of this text. It ...
Whispering-gallery-mode microdisk lasers
... collected from the side by a CCD (charge coupled devices)-equipped spectrometer [Fig. 1(d)]. Experimentally, it is found that the increase of the pumping light intensity (I) led to an abrupt rise of the laser output at I th ¼ 634 mW=cm2 . The highest peak at the wavelength around 639 nm is the resul ...
... collected from the side by a CCD (charge coupled devices)-equipped spectrometer [Fig. 1(d)]. Experimentally, it is found that the increase of the pumping light intensity (I) led to an abrupt rise of the laser output at I th ¼ 634 mW=cm2 . The highest peak at the wavelength around 639 nm is the resul ...
mm {0.84 M PASS
... rect-bandgap semiconductor having a thickness be wavelength wave energy detected by the silicon detec tween opposed faces thereof in a range of 50-400 mi tor of second detector 216 is insuf?cient to cause cross crometers, said direct bandgap exhibiting an energy talk. Third, the residual energy re?e ...
... rect-bandgap semiconductor having a thickness be wavelength wave energy detected by the silicon detec tween opposed faces thereof in a range of 50-400 mi tor of second detector 216 is insuf?cient to cause cross crometers, said direct bandgap exhibiting an energy talk. Third, the residual energy re?e ...
A Presentation on Design and Implementation of Wavelength
... • Converters can be classified as fixed or tunable output wavelength respectively. • Wavelength converters can be classified according to the level of generation they provide i.e. WCs based on optical-electronic translation typically provide 3R ...
... • Converters can be classified as fixed or tunable output wavelength respectively. • Wavelength converters can be classified according to the level of generation they provide i.e. WCs based on optical-electronic translation typically provide 3R ...
DTS0116-Optical Coatings.qxd
... Q: Can you custom design coatings for our application? A: Yes, we'll be glad to provide custom thin film designs. Keep in mind that for custom size parts a non-recurring engineering charge may be necessary to cover the cost of special tooling needed to hold parts during the coating process. Q: Do yo ...
... Q: Can you custom design coatings for our application? A: Yes, we'll be glad to provide custom thin film designs. Keep in mind that for custom size parts a non-recurring engineering charge may be necessary to cover the cost of special tooling needed to hold parts during the coating process. Q: Do yo ...
Fiber-optic communication
Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information. First developed in the 1970s, fiber-optic communication systems have revolutionized the telecommunications industry and have played a major role in the advent of the Information Age. Because of its advantages over electrical transmission, optical fibers have largely replaced copper wire communications in core networks in the developed world. Optical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Researchers at Bell Labs have reached internet speeds of over 100 petabit×kilometer per second using fiber-optic communication.The process of communicating using fiber-optics involves the following basic steps: Creating the optical signal involving the use of a transmitter, relaying the signal along the fiber, ensuring that the signal does not become too distorted or weak, receiving the optical signal, and converting it into an electrical signal.