MITSUBISHI

MITSUBISHI LASER DIODESML6XX11 SERIESFOR OPTICAL INFORMATION SYSTEMSI Far field patternML6XX11 oscillates in the fundamental transversemode (TEoo) regardless of light output level. Thetypical size of the light emitting area (the spot sizeof near field pattern) is about 2.3 JJ. m x 0.9 JJ. m.Figures 7 and 8 respectively show the typical nearfield patterns which are parallel (8 II) andperpendicular (8 J.) to the active layer. The fullangles at half maximum points are typically 11 08/1Fig. 7 Far field pattern (J "30mWand 26 0•Angle (deg.)Fig. 8 Far field pattern (J J.S0.SoAngle (deg.)I Light output vs. monitoring output characteristicThe laser diode emits beams from both the frontand rear sides.The intesities of these beams are inproportional relationship. Therefore. the rear beamis used for monitoring the front beam. Figure 9shows the typical front beam output vs. monitoroutput current characteristic of ML64111 N. Whenthe front beam output is 30mW. the monitoroutput typically becomes 0.9mA.Fig. 930j! 20d's~::J0.E 100>:::;Light output vs. monitor output current/ V/// ~0o 0.2 0.4 0.6 0.8 1.0Monitor output cuirent 1m (rnA)2-125