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 condensates or the so-called lasers without inversion, where reabsorption is forbidden by means of destructive interference can produce coherent light, too.
Exploring Coherent States in Quantum Mechanics: From Lasers to …
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 equality. This allows the wave packet to travel in space in a more localized fashion (like …
Understanding the Inverse Square Law for Laser/Coherent Light
2004年1月19日 · The Inverse Square Law for Laser/Coherent Light is a physical law that states that the intensity of light from a point source is inversely proportional to the square of the distance from the source. How does the Inverse Square Law affect the brightness of a laser beam?
The length of laser's optical cavity. Multiple of wavelength?
2008年2月24日 · This ensures that the waves within the cavity are in phase and can produce a strong, coherent laser beam. 4. How does the length of a laser's optical cavity affect the laser's output? The length of a laser's optical cavity can affect the laser's output in several ways. It can determine the laser's mode structure, which impacts the beam size and ...
Exploring the Physics of LASER: Classical vs Quantum Mechanics
2020年12月5日 · The LASER can be represented as a coherent state in quantum mechanics, but it can also be thought of as a classical light source by describing it using classical electromagnetism. This is because the light produced by the LASER can be described as a solution of the classical Maxwell equations.
Coherent state of photons in a laser - Physics Forums
2012年10月30日 · A coherent state of photons in a laser is created by stimulating a population of atoms or molecules to emit photons in the same direction and with the same frequency and phase. This can be achieved through processes such as population inversion, where more atoms or molecules are in the excited state than in the ground state.
Can Two Laser Beams with Different Phases Interfere? - Physics …
2020年9月18日 · 3. Can two laser beams with a phase difference ever interfere constructively? Yes, two laser beams with a phase difference can interfere constructively if the difference is a multiple of the wavelength of the laser light. This is known as coherent interference and is used in many applications, such as holography. 4.
What is the Difference Between Coherent and Incoherent Light?
2013年1月23日 · A laser is a common source of coherent light. The light waves in a laser are all aligned and travel in the same direction, resulting in a narrow beam of light with a consistent wavelength and phase. What is the importance of coherent light in scientific research? Coherent light is essential in many experiments and technologies, such as ...
Non-Coherent Light Diffraction through Double Slit - Physics Forums
2011年5月29日 · The main difference between non-coherent light diffraction and coherent light diffraction is the visibility of the interference pattern. Coherent light produces a clear and distinct pattern, while non-coherent light produces a less visible and often blurred pattern due to the random phase differences of the light waves.
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 frequency, but is not enough to ionize the atoms or excite the atoms to higher states. 2. A train of evenly-spaced XUV attosecond laser pulses are directed at the cloud of ...