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I've seen some blue laser pointers that claim 445nm, others claim 447nm, while others 450nm. Are these all actually refering to the same technology of laser diode, but the sellers are being imprecise and just rounding the numbers differently? 447 rounded to the nearest 5 would be 445, while 447...

532nm DPSS laser pointers can cost well under $100, but 473nm DPSS lasers can easily cost $500, even though they use the same DPSS techonlogy. Why is 473nm so much more expensive? Does the IR diode use a wavelength where the semiconductor material for that diode is more expensive, or does the...

Is there something special about this wavelength, that it is separate from the "Blue, Yellow, & Other Colored Lasers" section of the forum?

I have read that while normal table-top lab laser power supplies don't have this issue, fully potted HeNe laser power supplies (like when the HeNe laser is an embedded component in some device that uses the laser, such as older table-mounted barcode scanners) are power supplies that can...

I've heard that most so called "5mW" 405nm lasers are actually not actually 5mW at all, but rather are using 50mW 405nm laser diodes to produce a visual approximation of the brightness of a 5mW red laser pointer. I've read that the 405nm wavelength is much dimmer than the 650nm or 630nm...