589nm DPSS yellow laser, 593nm 594nm Diode Lasers. Yellow dpss lasers (560-589nm) are used primarily in DNA sequencing & certain microscopy applications. If you just need a yellow laser pointer flashlight , check this 589nm Yellow Laser Pointer .
Most of the Yellow Laser Diodes have a wavelength of 589nm 593nm 594nm. The yellow laser diode is solid state DPSS laser system, its like this :
There are no yellow laser diodes like traditional TO package as following.