Understanding Coherence in Laser Light Emission - Physics Forums
2010年1月17日 · A laser needs inversion in order to prevent stimulated absorption, but it is not necessarily a precondition for a buildup of coherence - for example coherent outcoupling from …
Are Lasers Truly Examples of Quantum Coherent States? - Physics …
2014年3月13日 · So a coherent state in quantum mechanics is "the most classical" quantum state (A Gaussian wave packet), which satisfies the Heisenberg uncertainty relation with an …
Coherent state of photons in a laser - Physics Forums
2012年11月2日 · Ug, one yes one no... The assumption is a monochromatic light source (532 nm green laser pointer). Regarding the coherence of the phase, how would you get interference …
The length of laser's optical cavity. Multiple of wavelength?
2008年2月22日 · In order to produce coherent laser light is it necessary that the length of optical cavity between the mirrors is a multiple of the wavelength of laser... Insights Blog -- Browse All …
How Can LASER Be Both a Quantum and Classical Light Source?
2020年12月5日 · My question is the physics behind the LASER such as stimulated emission can be only explained by quantum mechanics only. We can represent LASER as coherent state in …
Understanding the Inverse Square Law for Laser/Coherent Light
2004年1月19日 · Now, if someone were to measure the intensity of the laser signal on the moon, and assumed that it was the result of a point source radiating equally in all directions (i.e. they …
What is the Difference Between Coherent and Incoherent Light?
2013年1月23日 · The femtosecond laser pulses are coherent in this sense. This simple factorization condition has interesting consequences. For example, the independence of …
Questions on Electron Orbitals, Wave Packets, and Coherent States
2008年4月6日 · 1. A weak IR-frequency laser is shown on a cloud of atoms. This causes the electrons to "wiggle" back and forth in the direction of the laser's E-field at at the laser's …
Can Two Laser Beams with Different Phases Interfere? - Physics …
2020年9月18日 · Also, they aren't perfectly coherent. They have a coherence length, which is the typical distance across the beam where they remain more or less coherent, and a coherence …
Gamma Ray Laser, possible? Superior Weapon? - Physics Forums
2012年11月9日 · I don't think there is any way to make a gamma-ray laser at this time. Gamma rays are extremely high energy, typically thousands to millions of electron-volts per photon, …