www.roithner - laser.com - 1 - 10/04 /13 rlco - 940 - 4 000 - to3 technical data high power infrared laser diode features ? lasing mode structure: multi mode ? peak wavelength : typ. 940 nm ? optical ouput power: 4 w ? package: to - 3, without photodiode electrical connection pin configuration b ottom view pin function 1 ld cathode (isolated from case) 2 ld anode absolute maximum ratings item symbol value unit cw output power p o 5 w operating case temperature t c - 10 ? +25 c storage temperature t stg - 20 ? +8 0 c specifications item symbol min. typ. max. unit optical specifications cw output power p o - 4 - w center wavelength c 937 940 943 nm spectral width (fwhm) ? - 3 - nm wavelength temperature coefficient ? / ?t - 0.3 - nm/c fwhm beam div ergence U - 9 - deg - 32 35 deg cavity length - 2000 - m emitting width w - 2 00 - m polarization ratio (te) - 95 - % electrical specifications threshold current i th - 0.7 - a operating current i op - 5 - a power conversion efficiency 40 - - % slope efficiency - 0.9 - w/a operating voltage u op - 1.9 - v the above specifications are for reference purpose only and subjected to change without prior notice.
www.roithner - laser.com - 2 - 10/04 /13 package dimensons to - 3 package ( unit:mm )
www.roithner - laser.com - 3 - 10/04 /13 safety of laser light ? la ser light can damage the human eyes and skin. do not expose the eye or skin directly to any laser light and/or through optical lens. when handling the lds, wear appropriate safety glasses to prevent laser light, even any reflections from entering to the ey e. focused laser beam through optical instruments will increase the chance of eye hazard. ? this ld is emitting invisible light. cautions 1. operating methode ? this ld shall change its forward voltage requirement and optical ouput power according to temperature change. also, the ld will require more operation current to maintain same ouput power as it degrades. ? confirm that electrical spike current generated by switching on and off does not exceed the maximum operating current level specified herein above as abs olute maximum rating. also, employ appropriat countermeasures to reduce chattering and/or overshooting in the circuit. 2. static electricity ? static electricity or electrical surges will reduce and degrade the reliability of the lds. it is recommended to use a wrist trap or anti - electrostatic glove when handeling the product. 3. absolute maximum rating ? active layer of lds shall have high current density and generate high electric field during its operation. in order to prevent excessive damage, the ld mus t be operated striclty below absolute maximum rating.
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