0
What else can I help you with?
What is the difference between solid state laser and semiconductor laser?
LASER is Light amplification by stimulated emission of radiation. As far as I have understood, Solid State laser is a macroscopic form of diode laser. Thus a small semiconductor diode is similar to a solid state laser except for the mechanism of lasing and size.
What type of laser is a thor laser?
A thor laser is a type of solid-state laser that uses a ceramic gain medium to produce high-energy pulses of laser light. It is known for its compact size, high efficiency, and reliability in industrial and scientific applications.
Why 4 level laser system is better than 3 level laser system?
Three and Four Level Laser SchemesWe have said that the two level scheme is not generally feasible for laser action. There are two main reasons for this. The first reason is that the energy being used to pump the particles into the upper laser state has an equal probability of stimulating them back down. Thus it is not possible to get nore than half of the particles into the excited state. The three level scheme gets around this problem by first exciting the particles to an excited state higher in energy than the upper laser state.(See figure below) The particles then quickly decay down into the upper laser state. It is important for the pumped state to have a short lifetime for spontaneous emission compared to the upper laser state. The upper laser state should have as long a lifetime (for spontaneous emission) as possible, so that the particles live long enough to be stimulated and thus contribute to the gain.The four level laser scheme goes one step further and also depopulates the lower laser level by a fast decay process.(see figure below) This greatly decreases the loss of laser photons (v2) by stimulated absorption processes since the particles in the lower laser level have a short life-time for spontaneous emission.
What is the principle working construction of junction laser?
the junction lasers principle is like a normal laser but a specific junction will activate it. This is good because if you are away from the where the laser is then you can activate it without being there.
Difference between he-ne laser and ruby laser?
1.he-ne laser is gaseous state. Ruby is solid state laser. 2.he-ne laser requires electrical pumping. ruby laser requires optical pumping. 3.he-ne laser has 4 energy levels. ruby has 3 energy level. 4.he-ne laser gives continuous output. ruby laser gives output in form of pulse 5. he-ne laser is cheaper
What is the role of metastable state in laser?
The role of metastable states in circumventing laser pulse jitters in multi-step laser excitation of high-lying Rydberg and autoionizing states is discussed. A case study is presented where step-wise excitation of 3d4d (3)G(3,4,5) states of Ca is achieved despite a large jitter between the laser pulses
What is metastable state of plasma?
Excited state of an atom, nucleus, or other system that has a longer lifetime than the ordinary excited states and generally has a shorter lifetime than the ground state. It can be considered a temporary energy trap or a somewhat stable intermediate stage of a system of which the energy may be lost in discrete amounts. The many photochemical reactions of mercury are a result of the metastable state of mercury atoms, and radiation from metastable oxygen atoms accounts for the characteristic green colour of the aurora borealis and aurora australis.
What radioactive decay processes have no transmutation?
Only gamma, it is the process by which a metastable excited nuclear isomer of an isotope relaxes down to the ground state of the same isotope. Some metastable states must undergo multiple gamma decays through less excited metastable states to reach the ground state.
What information is conveyed by the m in 99mTc?
The "m" in 99mTc indicates that the technetium is in a metastable state. This means that the technetium is in an excited nuclear state that will decay to a more stable state by emitting gamma radiation. Metastable technetium is commonly used in nuclear medicine imaging.
What is dynamic metastable equilibrium?
Dynamic Metastable Equilibrium as it relates to Geomorphology describes a system threshold that changes dramatically through time, in an otherwise steady system. In other words, it is a combination of dynamic equilibrium and metastable equlibrium. An example would be changing sea level as it respositions shorelines these changes typically ocurr over thousands of years.
What is metastable ion in mass spectroscopy?
A metastable ion in mass spectrometry is an ion that has been excited to a higher energy state but has not yet undergone fragmentation. These ions can exhibit unique fragmentation patterns different from those of ground-state ions, providing additional structural information. Metastable ions are often formed in collision-induced dissociation experiments.
Why metastable state is more stable then excited state?
because according to energy profile,metastable state is lying lower than excited state.as we know that states of lower energies are more stable than states of higher energy.so it is more stable than excited state.
What is metastable zone width?
The metastable zone width is the range of temperatures within which a substance can exist in a metastable state, meaning it is supercooled or supersaturated and undergoing phase transformation. It is important in processes like crystallization and pharmaceutical formulation to control the conditions for desired product properties.
What kind of flip flop has no invalid or unused state?
None, all flip flops have a small probability of entering a metastable invalid state.
Why ruby laser is a solid state laser?
laser production is done by a solid state active working material.
Can water stay liquid at subzero temperatures if you had enough pressure?
The sub zero liquid state is an achievable metastable state with an energy level between that of the gas and solid. Subzero water in this metastable state is said to be super-cooled. In the temperature range 0c to -40c the supercooling phenomenon is prevalent. Reference: See the related link below.
How electrons can stay in the metastable state for longer time?
To leave a state and decay to a lower energy state, the electron must lose energy. In metastable states, there are no lower energy state to go to that have strongly allowed transitions (that is simple emission of a photon, diplole transititions) and so the electron must decay by slower, less probable means (like two photon decay, magnetic dipole decay). Hence, it stays in that state for longer.
