Q – Switched Nd Yag Laser

Technology, Applications & types of Systems

Lasers are used throughout the world for its unparalleled ability to target pigment on the skin. Leading Dermatology, Plastic Surgery and Laser Specialty Clinics value Q-switched lasers for the efficacy of a variety of skin related problems primarily, i.e., unwanted tattoos. The technology behind the Laser Treatment along with its various applications and the different types of systems available in the market.

The Technology

Exploring the technology of a Q-Switched (QSW) Nd: YAG laser, there are three elements to explain *The laser, *The Nd: YAG rod, *The Q-switched pulse


A laser is actually an acronym for ‘Light Amplified Stimulated Emission Radiation.’ Lasers produce photons that travel at a specific speedy wavelength in a not diffuse beam.

The techniques that differ in its powerfulness and potentiality are different in the classifications of lasers (ranging from I – IV). Lasers that have no potential danger under normal use are known as Class I lasers and the most powerful class of Lasers are known as Class IV Lasers. All Q-Switched Nd: YAG Lasers are Class IV lasers, which means eye protection and proper protocols is used for safety.


Q-Switched lasers produce extremely short pulses of energy. Both nanosecond lasers (billionths of a second pulse) and picosecond lasers (trillionth of a second pulse) are types of Q-switched lasers.

Lasers which are able to condense a very large amount of energy in a very fast pulse rate creates a high “peak” of energy level.

A Q-switched Nd: YAG laser produces light which travels at the 1064 nm wavelength intense pulses. Most Q-switched lasers also have a KTP filter frequency-doubled the light into the 532 nm wavelength.

Aesthetic Applications

There are two elements that make Q-Switched Nd: YAG lasers very essential for treating skin conditions:

1. The 1064 nm and 532 nm wavelengths can be very useful for targeting certain pigments.

2. The pulse is so powerful that it destroys the target and is not harmful to the skin.

The classifications of a laser are useful for treating:

In all the cases, the QSW Nd: YAG laser is very important for the treatment because the laser is able to penetrate into the skin or cell without affecting it and has the energy absorbed by the target whether it’s tattoo pigment, haemoglobin, melanin or fungus related.

The two different kinds of wavelengths are used for different applications as they are absorbed differently by pigments and chromophores.

Types of Q-Switched Nd: YAG Lasers

While most QSW Nd: YAG lasers have more similarities than differences as there are certain subcategories one need to navigate to explore systems.

Active vs Passive

Actively Q-switched lasers and passively-Q-switched lasers produce the dual 1064 nm / 532 nm wavelengths and ultra-short pulses.

The difference between the two is that the actively Q-switched lasers have a more complex pulse production that allows for greater pulse energy and in reaching to the peak power. Passively Q-switched lasers are always less powerful and more affordable. The differences between the two are as follows:

Picosecond vs Nanosecond

The trend of picosecond laser is more popular at present in the aesthetic laser marketplace.

It can remove tattoos in fewer treatments as because the pulse is shorter than nanosecond Q-switched lasers. However, there are two factors that can affect the peak power by both pulse duration and pulse energy.

While most picosecond lasers have a very small advantage with their slightly shorter pulse, they also have certain disadvantages with reduced pulse energy. As a result, the peak power for a nanosecond and picosecond systems are comparable, yet picosecond systems are formed with reliability issues.

Tattoo Removal

In-Demand and Easy to Perform

As the lifestyle changes and according to the trend with time, the tattoo was made. After a few years, it certainly requires a great need for a reliable tattoo removal method. DHLs Q-switched lasers give practitioners an effective solution for this growing market. Now a day, Laser tattoo removal has become simple, fast and highly profitable.

How Laser Tattoo Removal Works

Laser tattoo removal is surprisingly easy to perform as the science behind removal is very advanced. DHLs Q-switched lasers are more sophisticated and powerful than those for other aesthetic treatments compared in the world. According to quality and precision, it is necessary for safe, effective laser tattoo removal.