https://eng.libretexts.org/Bookshelves/Electrical_Engineering/Electro-Optics/Book%3A_Ultrafast_Optics_(Kaertner)/04%3A_Laser_Dynamics_(single-mode)/4.04%3A_Q-Switching
Active Q-Switching. Figure 4.5 shows the principle dynamics of an actively Q-switched laser. The laser is pumped by a pump pulse with a length on the order of the upper- state lifetime, while the intracavity losses are kept high enough, so that the laser can not reach threshold. Therefore, the laser medium acts as an energy storage.

https://en.wikipedia.org/wiki/Q-switching
Q-switching, sometimes known as giant pulse formation or Q-spoiling, is a technique by which a laser can be made to produce a pulsed output beam. The technique allows the production of light pulses with extremely high peak power, much higher than would be produced by the same laser if it were operating in a continuous wave (constant output) mode.. Compared to modelocking, another technique for

https://www.rp-photonics.com/q_switching.html
The beam deflection angle of an acousto-optic Q-switch must be large enough such that the diffracted beam really leaves the resonator. In some cases, this leads to the demand of a high drive frequency of the Q-switch - e.g. 80 MHz, while 40 MHz is sufficient for other lasers. Critical cases are those with large beam divergence within the Q

https://www.sciencedirect.com/topics/engineering/q-switching
The use of electrooptic and acoustooptic elements as light modulators has been described earlier. It is apparent that a Q-switch is a specialized type of modulator. The operation of an electrooptic Q-switch is shown schematically in Figure 5-18, using a ruby laser as an illustration. The light emitted from the rod in the orientation shown in

https://www.laserfocusworld.com/lasers-sources/article/16549534/solid-state-lasers-laser-pulsing-the-nuts-and-bolts-of-q-switching-and-modelocking
At the start of each cycle, the Q-switching element is set to prevent lasing. While the Q-switch is in this mode, the pump energy, supplied continuously, is accumulated in the laser crystal (assumed to have a long upper-state lifetime). The Q-switch state is then changed, and the cavity loss quickly drops to zero. This causes a short pulse to

https://physicswave.com/q-switching-in-laser/
Q switching in laser. Q switching in laser is a technique of reducing giant Plus ( i.e short duration high energy plus). It is achieved by pumping the gain or active medium in the absence of the mirrors of the cavity or resonator ( i.e the feedback mechanism ) and then the mirrors of the cavity are switched on to get a giant of short duration.

https://www.photonics.com/Articles/Understanding_Actively_Q-Switched_Solid-State/a56630
Resonator design issues for high pulse energies Many Q-switched solid-state lasers have a fairly simple laser resonator with only two mirrors: a flat output coupler and a curved, highly reflecting mirror on the opposite side, through which the pump power can be injected (Figure 3). It may seem easy to apply this to our example laser: Just use a very large curvature radius of −100 m for the

https://www.nature.com/articles/nphoton.2014.123
Using over 30 stacked monolayers of MoS 2 prepared by pulsed laser deposition, the team succeeded in making passively Q -switched lasers that operate at wavelengths of 1.06 μm, 1.42 μm and 2.1

https://ocw.mit.edu/courses/6-974-fundamentals-of-photonics-quantum-electronics-spring-2006/9817c9baafd71b0c65e8b62c388cafc8_q_swtch_mode_loc.pdf
Figure 7.28: Asymmetric actively Q-switched pulse. For example, with a diode-pumped Nd:YAG microchip laser [15] using an electro-optical switch based on LiTaO3 Q-switched pulses as short as 270 ps at repetition rates of 5 kHz, peak powers of 25 kW at an average power of 34 mW, and pulse energy of 6.8 μJ have been generated (Figure 7.29).

https://ieeexplore.ieee.org/document/6183683
Abstract: This chapter contains sections titled: Measuring the Output of Pulsed Lasers. Q-Switching. Types of Q-Switches. Mechanical Q-Switches. Acousto-Optic Q-Switches

https://link.springer.com/chapter/10.1007/978-3-030-82532-4_8
The shortest Q-switched pulses have been obtained with a passively Q-switched Nd:YVO \(_{4}\) microchip laser, using very short laser cavities and a semiconductor saturable absorber mirror (SESAM). With a Nd:YVO \(_{4}\)-crystal thickness of only 185 \(\upmu \) m, pulses as short as 37 ps have been generated with 53 nJ pulse energy, which corresponds to 1.4 kW peak power and 8.5 mW average

https://spie.org/publications/spie-publication-resources/optipedia-free-optics-information/fg14_p10-11_q-switching
Q Switching. Q switching is a method for generating intense short pulses (sometimes called "giant pulses ") of light with a laser. The basic principle is as follows: In a first phase, the gain medium is pumped, while the extraction of energy as laser light is prevented by keeping the resonator losses high (that is, the Q factor is kept low).

https://www.rp-photonics.com/acousto_optic_q_switches.html
Acousto-optic modulators (AOMs) can be optimized for the particular application of Q switching lasers.Such an acousto-optic Q switch is placed inside a laser resonator.While the laser is pumped, the RF input of the AOM is switched on, on that the diffraction losses of light circulating in the resonator are high ( because the diffracted beams leave the resonator), and lasing is suppressed.

https://link.springer.com/content/pdf/10.1007/978-3-662-14219-6_8.pdf
remember that besides the Q-switch extraction efficiency expressed by (8.12), the total energy extraction from a Q-switched laser depends also on the fluorescence losses and ASE depopulation losses prior to opening of the Q-switch. The overall efficiency of the Q-switch process was defined in Sect. 3.4.1 as the product of the

http://www.optique-ingenieur.org/en/courses/OPI_ang_M01_C01/co/Contenu_12.html
Q-switching. In order to store many atoms in an upper level, the flow to a lower level must first be limited. Thus, stimulated emission must be prevented by placing an attenuator in the cavity to stop light from travelling back and forth (note: this attenuator is usually a light modulator, rather than a mechanical shutter, which reduces the

https://link.springer.com/content/pdf/10.1007/0-387-29338-8_9.pdf
8.1 Q-Switch Theory 491 The pulse width of the Q-switch pulse can also be expressed as a function of the inversion levels, n i,n f,n t, t p = t r n i −n f n i −n t[1 +ln(n i/n t)]. (8.7) The equations for pulse energy, pulse width, and therefore peak power are expressed in terms of the initial and final population inversion densities

https://laserscientist.com/q-switched-lasers/
Q-switching is a fundamental principle that lies at the core of the exceptional performance of Q-switched lasers. By changing the Q-factor (Quality factor) of the laser resonator, these lasers can control the accumulation and release of laser energy.When the Q-factor is low, the laser medium accumulates energy, but when it is suddenly escalated, the stored energy is rapidly released

https://networklessons.com/switching/802-1q-tunneling-q-q-configuration-example
802.1Q Tunneling (Q-in-Q) Configuration. 802.1Q tunneling (aka Q-in-Q) is often used by Metro Ethernet providers as a layer 2 VPN for customers. 802.1Q (or dot1q) tunneling is pretty simple…the provider will put an 802.1Q tag on all the frames that it receives from a customer with a unique VLAN tag. By using a different VLAN tag for each

https://amadaweldtech.com/technical-glossary/q-switch/
Q Switch. Q-switching is a technique by which a laser can be made to produce a pulsed output beam with extremely high peak power - much higher than would be produced by the same laser if it were operating in a continuous wave (CW) mode. Q-switching leads to lower pulse repetition rates, with higher pulse energies, and much longer pulse durations.

https://www.videomaker.com/article/f1/17834-how-to-use-a-live-switcher/
While the take button is a direct cut, the t-bar uses transitions such as fade and wipe. The speed of the transition is relative to the speed in which you move the t-bar. A hand is poised to make the switch using the t-bar of a video switcher Auto button. An alternative to using the t-bar is the auto button.

https://electronics.stackexchange.com/questions/469210/switching-between-2-power-sources-using-just-a-switch
The center terminal of your slide switch is the common terminal of SW1: simulate this circuit - Schematic created using CircuitLab. The generic load is represented by resistor R1 and LED D1, and the two power sources are represented by V1 and V2. Note that both power sources share a common ground return from the load. Share.

https://electronics.stackexchange.com/questions/71753/whats-a-simpler-way-to-switch-between-power-sources
The highest performance (most power efficient/coolest) method is to use a FET OR-ing setup. Their primary advantage is a near-zero voltage drop, limited only by the R DS(on) of the FET and current sense resistor (10 mΩ total resistance is fairly easy, but 1-2 mΩ if you really need).. Controllers for said systems typically use a low-value sense resistor and appropriately-sized FET to connect

https://www.avforums.com/threads/can-sky-q-run-through-an-hdmi-splitter-switcher.2334449/
The Sky box REFUSES to work on this HDMI switcher. If I set up so that PS4, Wii and Sky all feed in to the switcher, it won't work. I now have to unplug the cable from the Sky box and then physically reconnect to the PS4 and back each time. I gather that this may be the result of DRM, that the Apple TV and Sky Q need to have direct connections.

https://support.switcherstudio.com/article/269-complete-switcher-studio-start-guide
Open the Switcher Studio app on all devices. On the remote device (s), there is no need to log-in. Simply tap Menu and then Share Camera or Screen. Tap Share Camera or Share Screen. On the main switcher, tap the Inputs tab (camera icon). Tap the name of each device that you would like to connect.

https://www.boxcast.com/blog/the-best-live-video-switchers-mixers-for-beginners
A live video switcher lets you take multiple video inputs and direct your video output. It's a device you need in order to switch between different camera angles within a multi-cam production. Think of it this way: If you have a live event with a speaker, an audience, and a wide shot of the entire location, you could use a switcher to shift

https://networkengineering.stackexchange.com/questions/37950/why-are-patch-panels-used-instead-of-connecting-directly-to-a-switch
Structured cabling is not used only for Ethernet connection. You can use it to connect for example a phone / DSL line, a fax or other device using a RJ11 or RJ12 connector, or a console cable (very useful to get the console of a network device in your comfortable office rather than in a noisy and cold IT room).

https://forums.directv.com/conversations/watching-directv-stream/using-directv-streaming-set-top-box-with-an-hdmi-switcher/63ee94815a3aad193708e347
Ludwick577. Looked for your HDMI switch on Amazon. Some of the reviews say your switch doesn't work well with the Directv Stream box. That the Directv Stream box doesn't provide enough power to the switch. Suggestion was to keep on another device while using the Dtv Stream box. I'd get a new switch--one that's 60hz.

https://forums.tomsguide.com/threads/hdmi-splitter-setup-works-with-all-devices-except-blu-ray-player-how-can-i-fix-this.463958/
I have four devices (cable box, xbox one, xbox 360, and blu-ray player) running into a 4-to-1 HDMI switcher. All the devices work fine, except I can't get a signal from the Blu-Ray Player. (It's an older model Panasonic). When I plug the Blu-Ray player directly into the TV, it works fine, but I'd like to use it with the HDMI switcher.