Podcast
Questions and Answers
In laser action, what occurs after photons are emitted?
In laser action, what occurs after photons are emitted?
- Creation of new energy states
- Formation of valence bands
- Absorption of electrons
- System transition between two energy states (correct)
What occurs in semiconductor lasers involving the conduction and valence bands?
What occurs in semiconductor lasers involving the conduction and valence bands?
- Formation of new semiconductor materials
- Two states are electronic states in an atom or ion (correct)
- Transition between two valence bands
- Vibrational modes of molecules
What is the term for the emission of photons when an electron spontaneously decays from a higher to a lower energy state?
What is the term for the emission of photons when an electron spontaneously decays from a higher to a lower energy state?
- Spontaneous emission (correct)
- Stimulated emission
- Conduction emission
- Valence emission
Which process results in two photons of the same energy and in phase?
Which process results in two photons of the same energy and in phase?
What effect does stimulated emission have on the polarization of the emitted photons?
What effect does stimulated emission have on the polarization of the emitted photons?
What is the result when a photon stimulates an electron to transfer between two energy states?
What is the result when a photon stimulates an electron to transfer between two energy states?
What is the main difference between continuous wave (CW) lasers and pulsed lasers?
What is the main difference between continuous wave (CW) lasers and pulsed lasers?
Who was responsible for demonstrating the first dye LASER action at IBM Labs in 1966?
Who was responsible for demonstrating the first dye LASER action at IBM Labs in 1966?
What was significant about the LASER system developed in 2010 at Lawrence Livermore National Labs?
What was significant about the LASER system developed in 2010 at Lawrence Livermore National Labs?
Which LASER system operates at ELI-NP Magurele with a power of 10 Petawatt?
Which LASER system operates at ELI-NP Magurele with a power of 10 Petawatt?
In what year was the first titanium sapphire LASER developed at MIT Lincoln Labs?
In what year was the first titanium sapphire LASER developed at MIT Lincoln Labs?
Why are pulsed operation lasers usually preferred to achieve higher pulse energy?
Why are pulsed operation lasers usually preferred to achieve higher pulse energy?
Which type of laser is divided based on the lasing material/medium?
Which type of laser is divided based on the lasing material/medium?
What is the typical wavelength range for Helium-neon lasers?
What is the typical wavelength range for Helium-neon lasers?
Which laser type is noted for having Nd: YAG as one of its examples?
Which laser type is noted for having Nd: YAG as one of its examples?
What process is laser action based on that involves the population inversion?
What process is laser action based on that involves the population inversion?
Which material is commonly used in Semiconductor/Diode Lasers?
Which material is commonly used in Semiconductor/Diode Lasers?
In terms of average power range, which laser type operates in the milliwatts to a hundred watts range?
In terms of average power range, which laser type operates in the milliwatts to a hundred watts range?
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