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532 nm Diode-Pumped Solid State (DPSS) Lasers
DPSS Laser Secured in
Thorlabs' compact 532 nm Diode-Pumped Solid State (DPSS) green laser modules are a combination of Nd:YVO4 and KTP crystals pumped by an 808 nm laser diode. The front window consists of a wedged glass filter, which blocks the IR source light and hermetically seals the module. DPSS lasers can be used like any typical semiconductor laser diode, but offer a much smaller beam divergence. The polarization of the DJ532-10 laser is perpendicular to the line made by pins 1 and 3 (see pin diagrams below) while the DJ532-40 laser has a polarization that is parallel to this same line. DPSS lasers are intended for CW operation and should not be pulsed.
These lasers are compatible with our LDM56 temperature-controlled laser diode mount using the LDM56DJ mounting flange (sold below). The Ø2.0 mm pin spacing on the rear is identical to our Ø5.6 mm laser diodes. Efficiency is reduced outside of the operating temperature range (20 to 25 °C) as a result of the temperature sensitivity of the laser crystals. In the absence of a regulated heat sink, the pump laser current is enough to heat the laser far above 25 °C.
These lasers can be used with any of our M9-threaded aspheric lens adapters if the temperature of the DPSS laser is controlled. Compatibility with our wide range of SM1-threaded (1.035"-40) components is possible using our S1TM09 adapter. The unthreaded portion of the housing can also be secured inside our AD9.5F Collimator Adapter. When mounting these lasers, it should be noted that there is an X-Y position offset between the pins and the emitted beam. These lasers are manufactured such that the emitted beam is concentric with respect to the housing. If mounting by the pins instead of the M9-threaded front face, the emitted beam will be slightly off-centered from the mount. Please contact Tech Support for more details.
For best results, please follow all typical laser diode handling procedures. Please note that the DJ532-10 (10 mW) monitor current only represents the power of the IR pump laser and not the output of the green DPSS laser. For this reason, we recommend using the DJ532-10 with a constant current laser diode driver. The DJ532-40 does not contain a monitor photodiode.
Laser Safety and Classification
Safe practices and proper usage of safety equipment should be taken into consideration when operating lasers. The eye is susceptible to injury, even from very low levels of laser light. Thorlabs offers a range of laser safety accessories that can be used to reduce the risk of accidents or injuries. Laser emission in the visible and near infrared spectral ranges has the greatest potential for retinal injury, as the cornea and lens are transparent to those wavelengths, and the lens can focus the laser energy onto the retina.
Safe Practices and Light Safety Accessories
Lasers are categorized into different classes according to their ability to cause eye and other damage. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. The IEC document 60825-1 outlines the safety of laser products. A description of each class of laser is given below:
The LDM56DJ mounting flange is used to secure a 532 nm DPSS laser to the LDM56(/M) temperature-controlled laser diode mount. To use, mount either the DJ532-10 or the DJ532-40 laser in the LDM56(/M) mount. Using the two 2-56 x 3/8" cap head screws provided with the flange, or with the mount itself, attach the flange to the mount.
Please note: this flange is sold separately from the LDM56(/M) Temperature Controlled Laser Diode Mount.