It be possible to engineer laser diode

high powered laser pointers

Would it be possible to engineer an exact 10x scale m140 or other 1000 mw laser pointer diode and have it still be a real laser diode? ie still emit coherent laser light at 445nm. I was thinking about how most laser diodes are either 3.8 or 5.6mm and if it would be possible to make one much larger.
It would obviously be very interesting for different reasons including the fact that it would really let you see the normally very small parts of a laser diode in much better detail. It would be almost like a learning piece to study a real diode much easier because their usually small.
It would also be interesting because it could emit 20w of highly focusablegreen laser pointer pen light visible for a long way almost like an advertising spotlight. I know this is just fun speculation and it will probably never happen but its interesting and fun to think about anyway.

Naturally powerful laser pointer collimation for 473nm blues

1000 mw laser pointer

This is a question for anyone who has a blue powerful laser pointer, pen or lab-style (or someone who knows a decent bit about them). Anyway, I have a 130mw lab-style blue laser and it has (for a visible light laser) pretty bad collimation + it is multi-mode.
My laser splits off into 3 beams at about 14 feet or so; and at about 25 feet the blue laser pointer beam is the size of a half-dollar! Also, I need a lens to light a match as well, though it will sting my skin at a couple feet from the aperture unfocused.
So, is is this (multi-mode and poor collimation) characteristic of 473nm 200mw laser pointer cheap? If you have a blue, is it like this?
Now I remember on LC that those few people who had the Spyder BX noted that those were Tem 02 (I think that's right - anyway there were three beams). I don't recall anyone saying much about collimation, other than that there was no way they could burn anything (or try - those weren't anywhere near 130mw, maybe around 35 or 40mw....) with out a lens.

What is the Pioneering Role in Laser Safety Regulations

This paper discusses FDA’s role in developing product standards and other activities such as informative brochures for physicians and public information for consumers. 150mW blue Laser Pointer traces the legislative history of the Radiation Control for Health and Safety Act of 1968 and subsequent development of the regulatory program including highlights major milestones.
In the early years before the regulatory program evolved and no national or international controls existed, FDA worked with state public health/radiation agencies, local fire departments, universities and industry to evaluate the public health impacts of these products. This laser safety concern launched legislative and regulatory events.
The Agency pioneered measurement methodologies and safety evaluations of emissions from the products and used the early science to make risk estimates to public health. In the 1960s when high-powered lasers became a source used for entertainment and artistic lighting at concerts, including outdoor events, there arose a serious potential for laser injury.
Now decades later, the FDA programs have implemented reporting requirements for the manufacturers and safety standards for equipment. This powerful laser pointer has resulted in greatly expanded controls of domestic and imported electronic products as products with significant hazard were removed from the market. Methods have evolved such as product recalls, embargoes, import detentions and alerts, a product review process, and field inspections and investigations. Coordination with state counterparts is also a significant part of the current controls.

that users should never direct a laser pointer beam

Numerous cases of such incidents have been reported, along with cases where individuals overreacted to being flashed. Reports of those exposed include a pilot, bus drivers, sports figures, a teacher, and police . Visible laser pointers operating with 1-5 mW power are Class 3a and can be hazardous if viewed even for a very short time. Users should never look directly into the beam of Class 3a laser pointers, which are required by Food and Drug Administration (FDA) regulations to be marked "DANGER." (Class 2 lasers are labeled "CAUTION.") Possible hazards include startle effects, flash-blindness, glare, and after-images if a person is struck directly in the eye. In some states, such as California, it is a criminal misdemeanor to shine a laser pointer at individuals who perceive they are at risk, and it is a felony to aim one at an aircraft. Some local governments have Laser Pointer 200mWpassed regulations requiring anyone purchasing a laser pointer to be 18 years of age or older. It is expected that the pending revision of ANSI Z136.1 will have a special section commenting on laser pointers. In addition, an even brighter pointer is now on the market whose wavelength is at 533 nm (green). This new technology uses a frequency-doubled Neodymium:YAG laser with a blocked infrared component.

Proceeded to click the laser on the package in my car

5Pcs 30mW 532nm Flashlight Style 1010 Type Green Laser Pointer Pen with 16340 BatteryCategory:30mW Laser PointerMarket price:$159.95Price:$95.99Product Code:LPP018511

Today I received my long awaited 12x BDR laser running at 380mA ad 555mw firepower, weighing a mere 2.2 ounces and 4 inches long.(thanks Daguin and Igor). I ripped open the package in my car, and proceeded to click laser pointer on. Visually it looked not much different, and I turned it off after I noticed I was burning my dashboard... I mounted it on my dealxtreme stand and ran it to the longest hallway in my house (58ft, measured awhile ago for this moment ).
My 220mw SF-AW was able to pop a balloon from 35ft in about 4 secs, so I was really curious as to the popping distance of a 12x. So I then commence to power up the laser and attempt to focus a dot 58 ft away on a black piece of paper. (it gets all glowy and sparkly like ) I feel it is focused enough, so I remove the paper to permit the beam to strike the balloon(it doesnt even look like a dot, I would say the diameter of the "focused spot" looked to be 1 inch long,therefore I am almost disappointed into thinking It will not turn out to be as powerful as hoped.
So I remove sed piece of paper...and in less than a second the balloon is gone. I am shell shocked1000 mw laser pointer. I run into my room, blow up two more balloons (dont even tie them) and run them back to the danger zone to be extinguished, one at a time in each hand. If you were in my home when this happened you would have heard a *pop* (1 sec later) *pop*.
I now scrambled up this message to provide you all with the info that, as suspected, 12x's easily hold up to their reputation. I will now do some other burns...and await nightfall to check beam-age.

Electra violet portable laser

The shortest wavelength available in a laser pointer, the Electra produces laser light very close to the ultraviolet part of the visible spectrum at 405 nm. The unique properties of this laser include the ability to excite fluorescent and 200mw laser pointer phosphorescent materials. The Electra can be a useful educational tool in the classroom as well as a reliable near-UV portable light source for field work.

Key Features:

    Starting at:$239 Includes free shipping, see pricing and ordering tab.
    Output Power: <5 mW
    Expected Life: 5000 hours
    Wavelength: 405 nm (violet)
    Key Feature: Violet beam causes fluorescence effect in various materials
    Package Includes: Portable laser, aluminum carrying case, instructions/warranty.
    Casing: High-gloss black painted brass housing
    Safety Info: Under 5 mW complies with Class IIIa regulations
    Duty Cycle: 100%

Build Review 3.5W+ Sinner's MS-Envy Custom Host 18350x2 @2.3A Build Thread

Build/Review: 3.5W+ Sinner's MS-Envy Custom Host
18350x2 @2.3A Build Thread

Hey All


I made a new laser using DTR's 9mm 445nm diode in the new MS-Envy Custom
Hosts and the results are astonishing , It is set at 2.3A current and puts out
an outrageous amount of power, Infact It is the most powerful laser i have made, Till date!

Components Used
- 9mm Nichia NDB7875 445nm Diode - DTR's Laser Shop
- MS-Envy 18650 Custom Host (2.3A JAD Kit).
- AW 18350x2 Li-Mn (IMR).
- Stock G9 Lens in DTR Brass Lens holder.
- ARGMeter Ophir 5W LPM with Data Logging.

MS-Envy - 18650 Custom Host Features:

- 30mm OD , Solid Aluminium Extended Heatsink*
- 5.25mm Thick Aluminium Walls.
- Double sided 17mm Driver Pill Pressfit-Design** (Dual-Driver support).
- Holds Both Single 18650 as well as Double 18350/16340.
- ExtraOrdinary Stable Builds for more than 5min Duty Cycle.
- Tripod Mount 1/4" Standard 3mm Set Screw.
- Metail Clicky - Polished

Recommended Duty Cycles:

<180s for 9mm Diode @2.4A
<300s for 9mm Diode @2.2A
<600s for 9mm Diode @2.0A
Maximum*: 15minutes @2A

Recommended: 15minutes M140 Diode @1.8A
Maximum*: Unlimited <1hr


The Build:
i - The Pill:
I cut a piece of protoboard and rounded it using cutting pliers, Filed down the
edges to give it a perfect tight fit, laser pointer I used a couple of pliers to hold the board
and pressed it in , Notice the negative wire is sandwiched down on the pill
which will later be soldered to make ground contact.





ii - The JAD Kit:


iii - DTR's module:


iv - Cut extra wire:


v - Soldering the Leads togather and shrink wrap them:



vi - Insert the module:



Build Complete:





LPM Test:


Now we come to the interesting part of any build, The LPM test I did two consecutive LPM tests, The tests were done in airconditioned environment.



3.55W Peak



Obligatory Images of Sinner's Custom Hosts