Working material energy storage q-switching process

What is Q switching?

Categories: light pulses, methods DOI: 10.61835/fdh Cite the article: BibTex plain text HTML Link to this page LinkedIn Q switching is a technique for obtaining energetic short (but not ultrashort) light pulses from a laser by modulating the intracavity losses and thus the Q factor of the laser resonator.

How does passive Q switching work?

For passive Q switching (sometimes called self Q switching), the losses are automatically modulated with a saturable absorber (Figure 2). Here, the pulse is formed as soon as the energy stored in the gain medium (and thus the gain) has reached a sufficiently high level to overcome the total losses per round trip.

What are the key steps of a Q-switching process?

Key steps of the Q -switching process include the Q -switch state (cavity loss), energy storage, and output power as a function of time (see Fig. 1). At the start of each cycle, the Q -switching element is set to prevent lasing.

What is Q switching in laser resonator?

Q switching is a technique for obtaining energetic short (but not ultrashort) light pulses from a laser by modulating the intracavity losses and thus the Q factor of the laser resonator. The technique is mainly applied for the generation of nanosecond pulses of high energy and peak power with solid-state bulk lasers.

Which saturable absorber material is used for passive Q switching?

A frequently used saturable absorber material for passive Q switching of 1-μm YAG lasers is Cr 4+:YAG. For 1.5-μm erbium lasers, there are Co 2+:MgAl 2 O 4, Co 2+:ZnSe and other cobalt-doped crystals, and glasses which are doped with PbS quantum dots. V 3+:YAG crystals are suitable for the 1.3-μm region.

What is thermal energy storage based on phase change materials?

Thermal energy storage based on phase change materials (PCMs) is of particular interest in many applications, such as the heating and cooling of buildings, battery and electronic thermal management, and thermal textiles.