Reports of optical fiber communication systems 2011-2012
... When data rates were in the low gigabit range and transmission distances were less than 100 km or so, most fiber optic transmitters used directly modulated lasers. However, as data rates and span lengths grew, waveguide chirp, caused by turning a laser on and off, limited data rates. Dispersion prob ...
... When data rates were in the low gigabit range and transmission distances were less than 100 km or so, most fiber optic transmitters used directly modulated lasers. However, as data rates and span lengths grew, waveguide chirp, caused by turning a laser on and off, limited data rates. Dispersion prob ...
Optical Gain Experiment Manual
... The emitted light from the edge of the sample is collected (photo-luminescence spectrum) as shown in fig. 4 [4]. When the length of the stripe is short, the photoluminescence spectrum is broad. But, by increasing the length of the stripe, the emitted intensity increases super-linearly and the spectr ...
... The emitted light from the edge of the sample is collected (photo-luminescence spectrum) as shown in fig. 4 [4]. When the length of the stripe is short, the photoluminescence spectrum is broad. But, by increasing the length of the stripe, the emitted intensity increases super-linearly and the spectr ...
Adjusting the Brillouin spectrum in optical fibers for slow and fast
... Fig. 2 Pump source for the adjustment of the Brillouin spectrum. If the bandwidth of the gain is narrow the time delay is high but the pulses experience a strong distortion which leads to a broadening. The natural Brillouin bandwidth would result in data rates which could be delayed of only 15Mbit/s ...
... Fig. 2 Pump source for the adjustment of the Brillouin spectrum. If the bandwidth of the gain is narrow the time delay is high but the pulses experience a strong distortion which leads to a broadening. The natural Brillouin bandwidth would result in data rates which could be delayed of only 15Mbit/s ...
ECE 463/626: Optoelectronics Instructor: Prof. H. Grebel, Rm 302
... Course Description: The course addresses electronic and optical devices on the micron and nano-scales. Nano-scale optoelectronic devices (optical devices controlled by electronics and electronic devices controlled by optics) find themselves in the forefront of communication and sensing systems. Trad ...
... Course Description: The course addresses electronic and optical devices on the micron and nano-scales. Nano-scale optoelectronic devices (optical devices controlled by electronics and electronic devices controlled by optics) find themselves in the forefront of communication and sensing systems. Trad ...
Lecture 5. Confocal microscopy and instrumentation I
... 1. Has a waist M (not M2) times larger than the embedded Gaussian. 2. Will propagate with a divergence M times greater than the embedded Gaussian 3. Has the same curvature and Raleigh range. ...
... 1. Has a waist M (not M2) times larger than the embedded Gaussian. 2. Will propagate with a divergence M times greater than the embedded Gaussian 3. Has the same curvature and Raleigh range. ...
II. Optical properties of glass
... Physical specifications of colour are associated with objects, materials, light sources, etc., based on their physical properties such as: light absorption, reflection, or emission spectra. Colour is the perception, based on the varying sensitivity of different types of cone and rods cells in the re ...
... Physical specifications of colour are associated with objects, materials, light sources, etc., based on their physical properties such as: light absorption, reflection, or emission spectra. Colour is the perception, based on the varying sensitivity of different types of cone and rods cells in the re ...
Compact Optical Fiber Amplifier
... The spread of the Internet is leading to increased communication traffic and requires the evolution of Dense Wavelength Division Multiplexing (DWDM) technology. The Erbium Doped Fiber Amplifier (EDFA) developed using a gain flattening filter technique 1), 2) and an expansion of the signal wavelength ...
... The spread of the Internet is leading to increased communication traffic and requires the evolution of Dense Wavelength Division Multiplexing (DWDM) technology. The Erbium Doped Fiber Amplifier (EDFA) developed using a gain flattening filter technique 1), 2) and an expansion of the signal wavelength ...
ch 9
... • Transmitters, Receivers, and Rise Time – Rise time of transmitter is based on the response time of the LED or laser diode. – Rise time of the receiver is primarily based on the semiconductor device used as the detector. ...
... • Transmitters, Receivers, and Rise Time – Rise time of transmitter is based on the response time of the LED or laser diode. – Rise time of the receiver is primarily based on the semiconductor device used as the detector. ...
Slide 1
... or cathode, but not in the reverse direction. Charge-carriers—electrons and holes—flow into the junction from electrodes with different voltages. When an electron meets a hole, it falls into a lower energy level, and releases energy in the form of a photon. ...
... or cathode, but not in the reverse direction. Charge-carriers—electrons and holes—flow into the junction from electrodes with different voltages. When an electron meets a hole, it falls into a lower energy level, and releases energy in the form of a photon. ...
Optical amplifier
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics.There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fibre amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the incoming photons. Parametric amplifiers use parametric amplification.