index-guided high power algaas laser diode description the SLD231VL is a high-power, index-guided algaas laser diode. features low current consumption small astigmatism small package ( f 5.6mm) applications pickup for optical discs structure algaas quantum well structured laser diode pin photodiode for optical power output monitor recommended operating optical power output 35mw absolute maximum ratings (tc = 25?) optical power output p o 40 mw reverse voltage vr ld 2 v pd 15 v operating temperature topr ?0 to +60 ? storage temperature tstg ?0 to +85 ? ?1 e94y22b97-ps sony reserves the right to change products and specifications without prior notice. this information does not convey any licens e by any implication or otherwise under any patents or other right. application circuits shown, if any, are typical examples illustr ating the operation of the devices. sony cannot assume responsibility for any problems arising out of the use of these circuits. SLD231VL m-274 connection diagram common ld pd 3 21 pin configuration 21 3 bottom view 1. ld anode 2. pd anode 3. common
? 2 SLD231VL optical and electrical characteristics (tc = 25 c) tc: case temperature item symbol conditions min. typ. max. unit threshold current operating current operating voltage wavelength radiation angle positional accuracy differential efficiency astigmatism monitor current ith iop vop l q^ q // ? x, ? y, ? z ? f^ ? f // h d as im p o = 35mw p o = 35mw p o = 35mw p o = 35mw p o = 35mw p o = 35mw p o = 35mw p o = 35mw, vr = 5v 10 35 780 20 7 0.7 20 55 2.0 790 24 9 1.0 0.10 40 70 2.5 800 28 12 80 3 3 1.3 6 ma ma v nm degree degree m degree degree mw/ma m ma perpendicular parallel position angle handling precautions (1) eye protection against laser beams the optical output of laser diodes ranges from several mw to 4w. however the optical power density of the laser beam at the diode chip reaches 1mw/cm 2 . unlike gas lasers, since laser diode beams are divergent, uncollimated laser diode beams are fairly safe at a laser diode. for observing laser beams, always use safety goggles that block infrared rays. usage of ir scopes, ir cameras and fluorescent plates is also recommended for monitoring laser beams safely. s a f e t y g o g g l e s f o r p r o t e c t i o n f r o m l a s e r b e a m i r f l u o r e s c e n t p l a t e o p t i c a l m a t e r i a l l e n s l a s e r d i o d e o p t i c a l b o a r d o p t i c a l p o w e r o u t p u t c o n t r o l d e v i c e t e m p e r a t u r e c o n t r o l d e v i c e (2) prevention of surge current and electrostatic discharge laser diode is most sensitive to electrostatic discharge among semiconductors. when a large current is passed through the laser diode even for an extremely short time (in the order of nanosecond), the strong light emitted from the laser diode promotes deterioration and then laser diodes are destroyed. therefore, note that the surge current should not flow the laser diode driving circuit from switches and others. also, if the laser diode is handled carelessly, it may be destructed instantly because electrostatic discharge is easily applied by a human body. be great careful about excess current and electrostatic discharge.
? 3 SLD231VL package outline unit: mm s o n y c o d e e i a j c o d e j e d e c c o d e r e f e r e n c e s l o t 1 . 0 0 . 5 9 0 0 . 4 f 5 . 6 0 . 0 2 5 0 f 4 . 4 m a x f 3 . 7 m a x f 1 . 0 m i n 0 . 5 m i n w i n d o w g l a s s r e f e r e n c e p l a n e l d c h i p & p h o t o d i o d e 0 . 2 5 2 . 6 m a x * 1 . 2 6 1 . 2 0 . 1 6 . 5 2 3 1 3 f 0 . 4 5 p c d f 2 . 0 * o p t i c a l d i s t a n c e = 1 . 3 5 0 . 0 8 1 2 3 m - 2 7 4 p a c k a g e w e i g h t 0 . 3 g m - 2 7 4
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