Search results
Results From The WOW.Com Content Network
In semiconductor laser theory, the optical gain is produced in a semiconductor material. The choice of material depends on the desired wavelength and properties such as modulation speed. It may be a bulk semiconductor, but more often a quantum heterostructure. Pumping may be electrically or optically . All these structures can be described in a ...
[1] [2] For semiconductor lasers, the saturation effect is negligible. We derived the gain g for a Fabry-Perot semiconductor laser based on the density matrix equations and expressions for the natural linewidth. [1] [2] Thus, the linewidth theory [2] [8] [9] is an integral part of the nonlinear theory.
Period weight gain is a natural part of your menstrual cycle, but there are things you can do to manage bloating and maintain a healthy weight. Here’s what to do: Eat healthy foods.
Gain-switching is a technique in optics by which a laser can be made to produce pulses of light of extremely short duration, of the order of picoseconds (10 −12 s). [ 1 ] [ 2 ] In a semiconductor laser , the optical pulses are generated by injecting many carriers ( electrons ) into the active region of the device, bringing the carrier density ...
Gynecologists explain what causes you to gain weight during your period and how to prevent it from happening. Skip to main content. Lifestyle. Need help? Call us! 800-290-4726. Login / Join ...
Optical gain is the most important requirement for the realization of a semiconductor laser because it describes the optical amplification in the semiconductor material. This optical gain is due to stimulated emission associated with light emission created by recombination of electrons and holes .
The laser diode rate equations model the electrical and optical performance of a laser diode. This system of ordinary differential equations relates the number or density of photons and charge carriers in the device to the injection current and to device and material parameters such as carrier lifetime, photon lifetime, and the optical gain.
Additionally, in semiconductor laser diodes, electrons and holes are annihilated after recombining across the band gap and can play no further part in photon generation. However, in a unipolar QCL, once an electron has undergone an intersubband transition and emitted a photon in one period of the superlattice, it can tunnel into the next period ...