"Solid-state laser" is a phrase you'll often see when you're researching laser hair removal, but it's rarely explained. Here's what it actually means, why the wavelength matters for your skin, and why the machine is only half the story.
A laser that makes its light with a solid crystal
A solid-state laser creates its light inside a solid crystal. At Luminier, our Polaris Medical laser uses an Nd:YAG crystal, which produces one precise wavelength of light: 1064nm. That wavelength reaches deep into the skin and is well suited to all skin tones, including darker skin.
First, how does laser hair removal work?
Laser hair removal works by targeting melanin, the pigment that gives your hair its colour. The laser's light is absorbed by the pigment in the hair and turns into heat. That heat travels down to the follicle and damages it, slowing or stopping future growth.
The challenge is that your skin contains melanin too, especially darker skin. The goal is to get as much energy as possible into the hair follicle, and as little as possible into the skin around it. That's where the type of light makes a big difference.
What does "solid-state" mean?
Every laser has a "medium", the material that produces its light. In a solid-state laser, that medium is a solid crystal. Nd:YAG stands for neodymium-doped yttrium aluminium garnet, a crystal that produces infrared light at a wavelength of 1064 nanometres.
Because a laser produces a single wavelength, all of its energy is focused on one precise type of light, chosen for the job. This is different from IPL (intense pulsed light), which isn't actually a laser at all: it gives off a broad mix of wavelengths, filtered to a range.
A simplified illustration. IPL's mix of light is partly absorbed near the surface, while 1064nm travels deeper to reach the follicle.
The main types of hair removal technology
Here's a quick, simple comparison of the technologies you're likely to come across:
| Technology | What it is | Typically best for |
|---|---|---|
| IPL | Not a laser: a broad mix of light | Lighter skin with dark hair |
| Alexandrite (755nm) | Solid-state crystal laser | Lighter skin tones |
| Diode (around 810nm) | Semiconductor laser | Light to medium skin tones |
| Nd:YAG (1064nm) | Solid-state crystal laser, our choice | All skin tones, including darker skin (types IV–VI) |
A general guide only. Every client is assessed individually at their consultation.
Why 1064nm is so well suited to all skin tones
The longer 1064nm wavelength travels deeper into the skin and is less absorbed by the pigment in the skin's surface. More of the energy reaches the hair follicle, and less is taken up by the skin around it.
That's why Nd:YAG is widely regarded as one of the most suitable lasers for darker skin, where shorter wavelengths carry a higher risk of burns or changes in skin colour. It works well on lighter skin too, which is why we chose it: one laser that can treat the full range of skin tones. Laser hair removal for dark skin
Why consistent energy matters
For even results, every pulse of the laser needs to deliver the energy it's set to deliver. Consistent pulses mean each part of the treatment area gets the same treatment, which helps avoid patchy results and wasted sessions.
- Steady, consistent energy with every pulse
- Precise control of energy, pulse length and spot size
- Deep reach to the hair follicle
- Built-in cooling for extra comfort
What any laser can't do
It's important to be honest about this. Because lasers target pigment, no laser works well on grey, white, blonde or red hair, whatever the technology. Most clients need 6 to 10 sessions, and by the end of a course most see a 70–90% reduction in hair, with occasional top-ups. Hormonal hair, for example with PCOS/PMOS, may need more ongoing maintenance.
The machine is only half the story
Even the best laser won't give good results in the wrong hands. Results also depend on a proper consultation, a patch test, the right settings for your skin and hair, and someone who really understands what the laser is doing.
Before Luminier, I spent years as a software engineering team manager at Ocado, making advanced, automated technology work precisely and safely. I bring the same attention to detail to every treatment, alongside my VTCT Level 4 qualification in laser and light treatments. And I treat every client myself, every time, so your settings and progress are always tracked properly.
Frequently asked questions
Is IPL the same as laser hair removal?
No. IPL (intense pulsed light) gives off a broad mix of wavelengths, while a laser produces a single, precise wavelength. Both target hair pigment, but they are different technologies.
Is Nd:YAG better than a diode laser?
It depends on your skin and hair. Diode lasers are widely used and work well on lighter to medium skin. Nd:YAG's longer wavelength makes it one of the most suitable choices for darker skin, and it can treat a wide range of skin tones.
Does Nd:YAG laser hair removal hurt?
Some people find it slightly more intense than other lasers because it works deeper in the skin. Most clients describe it as a quick snap followed by warmth, and built-in cooling helps keep you comfortable.
Is it safe for dark skin?
Nd:YAG is widely regarded as one of the most suitable lasers for darker skin (types IV–VI) when used by a trained practitioner. A patch test before your first session lets us check how your skin responds.
See the difference for yourself
Book a free consultation and patch test. I'll assess your skin and hair, explain exactly how the laser will work for you, and create a plan with no pressure to book.
Luminier Laser Aesthetics is a private laser studio in Leighton Buzzard, welcoming clients from Linslade, Dunstable, Tring, Milton Keynes and Aylesbury.