Inquiry into Physics
Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 10, Problem 39Q
To determine

Distinguish between metastable state and normally allowed energy state. What is the role of metastable states in the operation of laser systems?

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Some of the most powerful lasers are based on the energy levels of neodymium in solids, such as glass, as shown in Figure below. (a) What average wavelength light can pump the neodymium into the levels above its metastable state? .(b) Verify that the 1.17 eV transition produces 1.06 micrometre radiation.
a) Problem 9.6 of Textbook: If the spot size at the mirror of a helium-neon laser is 0.5mm, what is the length of the laser cavity? The cavity is of the confocal-type and the wavelength is 633nm. b) For a semiconductor laser diode, the output power is 2mW and 4.5mW when the diode drive (injected) current is 50mA and 55mA, respectively. What is the threshold current (ith) of this laser diode? 4.
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