21.12.2011 RLT7890MG 1 of 3 RLT7890MG technical data high power infrared laser diode features ? lasing mode structure: single transverse mode ? peak wavelength : typ. 785 nm ? optical ouput power: 90 mw ? package: 5.6 mm electrical connection pin configuration bottom view n - type pin function 1 ld anode 2 ld cathode 3 absolute maximum ratings (t c =25c) item symbol value unit cw output power p o 90 mw pulsed output power* p o pulse 200 mw reverse voltage u r 2 t c operating case temperature t c - 10 ? +75 c storage temperature t stg - 40 ? +100 c * duty < 50%, pulse width <0.1s specifications (t c =25c) item test conditions symbol min. typ. max. unit optical specification cw output power cw, p o = 90mw p o - - 90 mw peak wavelength cw, p o = 90mw p 780 784 790 nm fwhm beam divergence cw, p o = 90mw U 8 8.8 10 deg 15 17 19 deg threshold current cw i th - 35 55 ma operating current cw, p o = 90mw i op - 115 160 ma slope efficiency cw, p o = 90mw - 1.05 1.3 mw/ma operating voltage cw, p o = 90mw u op - 1.85 2.2 v the above specifications are for reference purpose only and subjected to change without prior notice.
21.12.2011 RLT7890MG 2 of 3 package dimensons 9 mm package ( unit:mm )
21.12.2011 RLT7890MG 3 of 3 safety of laser light ? laser light can damage the human eyes and skin. do n ot 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 eye. focused laser beam through optical instruments will increase the chance of eye hazard. ? these lds are 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 operati on current to maintain same ouput power as it degrades. in order to maintain output power, use of apc (automatic power control) is recommended. which use monitor feedback to adjust the operation current. ? confirm that electrical spike current generated by s witching on and off does not exceed the maximum operating current level specified herein above as absolute maximum rating. also, employ appropriat countermeasures to reduce chattering and/or overshooting in the circuit. 2. static electricity ? static electrici ty 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 gener ate high electric field during its operation. in order to prevent excessive damage, the ld must be operated striclty below absolute maximum rating.
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