Dye lasers are unique in that they are a class of lasers whose lasing medium is a liquid. Depending on the particular dye used, output can be at a wide range of wavelengths spanning the visible spectrum and beyond. Commercial dye lasers are often pumped by other lasers. For example, Rhodamine-B, a common dye used in dye lasers for the red region,
Click here to download the full size of the above Circuit.
is often pumped with an argon ion laser at 514 nm for CW operation or a doubled YAG laser at 532 nm when pulsed. A suitable flashlamp can also be used as a pump source (but not just any old electronic flash - it needs to be very intense with a fast rise-time). As it turns out, this can easily be home-made. In fact, the overall construction of a flashlamp pumped dye laser is quite simple and straightforward, at least compared to nearly all of the other lasers discussed in this chapter. At most, a minimal vacuum system is required (for the home-made flashlamp) and there is absolutely no special glass work or need for exotic gases (though finding the highly pure dyes may require a little finger-work). The hazards are also relatively moderate - some of the organic dye materials are toxic and a high voltage power supply (low current but a BIG energy storage capacitor) is needed to fire the flashlamp. Laser output: The home-built Dye laser may be capable of producing a pulses of coherent light with enough energy to be a hazard to vision. Since there doesn`t seem to be any hard information on the actual power or energy obtainable with this or similar home-built laser designs, it is important to take precautions assuming a higher power until determined otherwise. Electrical: The power supplies can be lethal. Neon sign transformer based power supplies have enough voltage and current to stop a heart, The charged energy storage...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: