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RLD78MYA1 Datasheet(PDF) 2 Page - Rohm |
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RLD78MYA1 Datasheet(HTML) 2 Page - Rohm |
2 / 3 page RLD78MYA1 Laser diodes 2/3 ! ! Electrical and optical characteristics (Tc=25 °C) Parameter Ith η Im λ Min. − − − 0.1 0.05 8 20 − − − 770 60 Typ. 35 45 1.9 0.25 0.15 11 37 − − − 785 − ±2 ±3 Max. 60 70 2.3 0.6 0.3 15 45 ±100 810 − Unit mA − − Po =3mW Po =3mW Po =3mW,VR(PIN)=15V Po =3mW Po =3mW f =720kHz, ∆f=10kHz mA V mW/mA mA deg deg deg deg µm nm dB Conditions Parallel deviation angle Parallel divergence angle Perpendicular deviation angle Emission point accuracy Peak emission wavelength Perpendicular divergence angle Monitor current Differential efficiency Operating voltage Operating current Threshold current Signal-to-noise ratio 2mW I(3mW) −I(1mW) Symbol Iop Vop θ// θ⊥ ∆φ// ∆φ⊥ S / N ∆Y ∆Z ∆X ∗θ// and θ⊥ are defined as the angle within which the intensity is 50% of the peak value. ∗ ∗ ! ! ! ! Electrical and optical characteristic curves OPERATING CURRENT : IF (mA) Fig.1 Optical output vs.operating current 10 0 1 2 3 4 5 20 30 40 50 60 70 80 75 °C 70 °C 60 °C 40 °C 25 °C 0 °C −10°C PACKAGE TEMPERATURE : TC ( °C) 010 20 -10 30 40 50 60 70 80 10 100 90 80 70 60 50 40 30 20 Fig.2 Dependence of threshold current on temperature ANGLE (deg) Fig.3 Far field pattern -40 0 0.5 1.0 040 θ direction θ direction PACKAGE TEMPERATURE : Tc ( °C) -10 790 780 770 800 0 10 203040 50 80 60 70 Fig.4 Dependence of wavelength on temperature WAVELENGTH : λ (nm) 775 780 785 790 TC=25 °C PO=2.5mW PO=2mW PO=1mW Fig.5 Dependence of emission spectrum on optical output MONITOR CURRENT : Im (mA) Fig.6 Monitor current vs.optical output 0.1 0.2 0.3 0.4 0.5 0 1 2 3 4 5 |
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