lecture 3 Introduction to Laser
... Drawback: Excessive absorption of radiation in p and n layers of diode. Remedy: Add confinement layers on both sides of active ...
... Drawback: Excessive absorption of radiation in p and n layers of diode. Remedy: Add confinement layers on both sides of active ...
Tunable delay slow-light in an active fiber Bragg grating
... has attracted much attention because it can generate large delays at any wavelength and only requires low-power pump [11–14]. However, its narrow bandwidth does not allow delaying the narrow pulses [15], and thus SBS slow-light usually requires a relatively complicated system to improve the operatin ...
... has attracted much attention because it can generate large delays at any wavelength and only requires low-power pump [11–14]. However, its narrow bandwidth does not allow delaying the narrow pulses [15], and thus SBS slow-light usually requires a relatively complicated system to improve the operatin ...
4-2 Optical Heterodyne Detection for 60- GHz-Band Radio-on
... use a 60-GHz-band electroabsorption modulator (EAM) for downlinking and uplinking [2][3] . To receive optical power large enough to get high transmission quality, using some optical amplifiers is necessary in the optical link. However, accumulated amplified-spontaneous-emission (ASE) noise from the ...
... use a 60-GHz-band electroabsorption modulator (EAM) for downlinking and uplinking [2][3] . To receive optical power large enough to get high transmission quality, using some optical amplifiers is necessary in the optical link. However, accumulated amplified-spontaneous-emission (ASE) noise from the ...
Three-Wave Mixing with Three Incoming Waves: Signal
... and idler input powers well below (at least 10 dB) the 1 dB amplifier compression point [24]. The light blue trace is the measured, normalized signal output power P, as function of the relative phase between signal and idler. In addition, the data are fit to Eq. (3) which is then plotted as the ov ...
... and idler input powers well below (at least 10 dB) the 1 dB amplifier compression point [24]. The light blue trace is the measured, normalized signal output power P, as function of the relative phase between signal and idler. In addition, the data are fit to Eq. (3) which is then plotted as the ov ...
1.3.6 Electromagnetic radiation Name Symbol Definition SI
... is the amount (of substance) concentration, and l is the path length. Most tabulations give the specific optical rotatory power, denoted [α]. The wavelength of light used λ (frequently the sodium D line) and the Celsius temperature θ are conventionally written as a subscript and superscript to the s ...
... is the amount (of substance) concentration, and l is the path length. Most tabulations give the specific optical rotatory power, denoted [α]. The wavelength of light used λ (frequently the sodium D line) and the Celsius temperature θ are conventionally written as a subscript and superscript to the s ...
Tandem-Phase-Modulator-Based Optical Isolator in Silicon
... J0 (2A) = 0 (peak-to-peak modulation of 138 ) the carrier is fully depleted from the backward signal, and all the backward energy appears at other wavelengths. This can be seen in the simulated performance shown in the top row of Fig. 2. The problem with this design is that the isolation is narrow b ...
... J0 (2A) = 0 (peak-to-peak modulation of 138 ) the carrier is fully depleted from the backward signal, and all the backward energy appears at other wavelengths. This can be seen in the simulated performance shown in the top row of Fig. 2. The problem with this design is that the isolation is narrow b ...
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.