04.12.2012 rlt850m - 1wg50 1 of 3 rlt850m - 1wg50 technical data infrared laser diode algaas/ in gaas specifications ? structure: algaas/ingaas ? peak wavelength: 8 52 nm ? optical output power: 1 w , cw ? package: 9 mm, flat window ? m onitor pd: build - in electrical connection n - type pin config uration bottom view n-type pin function 1 ld cathode 2 ld anode, pd cathode (case) 3 pd anode electro - optical characteristics specified at 25c item symbol min. typ. max. unit optical specifications central wavelength c 8 47 8 52 8 57 nm spectral width (fwhm) ? - 2 4 nm optical output power p o - 1.0 - w beam divergence U - 8 11 deg. - 30 3 5 deg. emitting aperture w x h 1 x 50 m mode structure m m electrical specifications forward current i f - 1. 09 1.20 a threshold current i th - 180 220 ma forward voltage v f - 1.9 2.2 v slope efficiency 1.0 1.2 - w / a monitor current i m 0.05 - 1.3 ma absolute maximum ratings lifetime 10000 hour operating case temperature t c - 20 25 +50 c storage temper ature t stg - 40 - +85 c soldering temperature * t s ol - - 250 c * must be completed within 3 seconds note: the above specifications are for reference purpose only and subjected to change without prior notice.
04.12.2012 rlt850m - 1wg50 2 of 3 package dimensions 9 mm package unit: m m note: from 9 mm center to pd edge: 0.750.05 mm
04.12.2012 rlt850m - 1wg50 3 of 3 precaution for use 1. cautions ? this l d must be cooled! ? do not look directly into the emitting area of the ld during operation! ? warning: l d is emitting invisible light! 2. safety of laser light ? laser 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 eye. focused laser beam through optical instruments will increase the chance of eye hazard. 3. soldering conditions ? do not apply any stress to the lead particularly when heat. ? after soldering the lds should be protected from mechanical shock or vibration until the l ds return to room temperature. ? when it is necessary to clamp the lds to prevent soldering failure, it is important to minimize the mechanical stress on the l ds. 4. static electricity ? the lds are very sensitive to static electricity and surge voltage , whic h will reduce and degrade the reliability of the lds . it is recommended that a wrist band and/or an anti - electrostatic gl ove be used when handling the l ds. ? all devices, equipment and machinery must be grounded properly. it is recommended that precautions should be taken against surge voltage to the equipment that mounts the l ds. 5. operating method ? this ld shall change its forward voltage requirement and optical output power according to temperature change. also, the ld will require more operation current to maintain same output power as it degrades. in order to maintain output power, apc (automatic power control) is recommended, w hich use monitor feedback to adjust the operation current. ? confirm that electrical spike current generated by switching on and off does not exceed the maximum operating current level specified herein above as absolute maximum rating. also, employ appropriate countermeasures to reduce chattering and/or overshooting in the circuit. 6. heat generation ? thermal design of the end product is of paramount importance. please consider the heat generation of the l d when making the system design. the coefficient of temperature increase per input electric power is affected by the thermal resistance of the circuit board and density of ld placement on the board, as well as other components. it is necessary to avoid intense heat generation and operate within the maximum ratings given in the specification. ? the operating current should be decided after considering the ambient maximum temperature of l ds. 7. a bsolute 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 must be operated strictly below absolute maximum rating.
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