RLD78MYA1 Laser diodes CD players, CD-ROM laser diode RLD78MYA1 Though it is an open type package, by using a metal cap, pressing structure correspondence and protection of a laser element are enabled, and reliability is secured. !External dimensions (Units : mm) 2.6±0.1 3 2 φ1.6 LD Chip 6.5±1 1.35±0.1 1.2±0.2 2.3±0.5 Sub-mount φ3.6 φ2±0.25 1 !Features 1) φ5.6 metal shell type open package. 2) A laser element is protected by using a metal cap. 3) Interchangeability reservation with φ5.6 metal package of an industry standard. 5.6±0.025 2.4±0.1 φ4.4max. !Applications Compact disc players CD-ROM 3-φ0.45 Symbol Limits Unit Output PO 5 mW Reverse voltage !Absolute maximum ratings (Tc=25°C) VR 2 V Parameter Laser VR (PIN) 30 V Operating temperature Topr −10 to +70 °C Storage temperature Tstg −40 to +85 °C PIN photodiode 1/3 RLD78MYA1 Laser diodes !Electrical and optical characteristics (Tc=25°C) Parameter Conditions Symbol Min. Typ. Max. Threshold current Ith − 35 60 mA Operating current Iop − 45 70 mA Po=3mW Operating voltage Vop − 1.9 2.3 V Po=3mW η 0.1 0.25 0.6 mW/mA Im 0.05 Differential efficiency Unit − 2mW I(3mW)−I(1mW) Po=3mW,VR(PIN)=15V 0.15 0.3 mA 8 11 15 deg Perpendicular divergence angle θ// ∗ θ⊥ ∗ 20 37 45 deg Parallel deviation angle ∆φ// − − ±2 deg Perpendicular deviation angle ∆φ⊥ − − ±3 deg Emission point accuracy ∆X ∆Y − − ±100 µm λ 770 785 810 nm Po=3mW S/N 60 − − dB f=720kHz, ∆f=10kHz Monitor current Parallel divergence angle Po=3mW − ∆Z Peak emission wavelength Signal-to-noise ratio ∗θ// and θ⊥ are defined as the angle within which the intensity is 50% of the peak value. !Electrical and optical characteristic curves 3 2 1 20 30 40 50 60 70 80 40 30 20 0 10 20 30 40 50 60 70 θ direction θ direction 0.5 0 -40 80 0 40 OPERATING CURRENT : IF (mA) PACKAGE TEMPERATURE : TC (°C) ANGLE (deg) Fig.1 Optical output vs.operating current Fig.2 Dependence of threshold current on temperature Fig.3 Far field pattern 800 5 790 780 770 -10 0 10 20 30 40 50 60 70 80 OPTICAL INTENSITY : PO (mW) TC=25°C RELATIVE OPTICAL INTENSITY WAVELENGTH : λ (nm) 50 10 -10 0 10 1.0 100 90 80 70 60 RELATIVE OPTICAL INTENSITY 4 −10°C 0°C 25°C 40°C 60°C 70°C 75°C THRESHOLD CURRENT : Ith (mA) OPTICAL POWER : PO (mW) 5 PO=2.5mW PO=2mW PO=1mW 775 780 785 790 PACKAGE TEMPERATURE : Tc (°C) WAVELENGTH : λ (nm) Fig.4 Dependence of wavelength on temperature Fig.5 Dependence of emission spectrum on optical output 4 3 2 1 0 0.1 0.2 0.3 0.4 0.5 MONITOR CURRENT : Im (mA) Fig.6 Monitor current vs.optical output 2/3 RLD78MYA1 70 f=720kHz ∆f=10kHz PO=3mW 5 2 10 -12 80 5 2 10-13 90 5 2 -14 10 20 30 40 50 60 100 10-10 60 f=720kHz ∆f=10kHz T=25°C PO=3mW 70 -11 10 10-12 80 -13 90 10 10-14 0 0.01 0.1 1 TEMPERATURE (°C) OPTICAL FEEDBACK (%) Fig.7 Temperature dependence of noise Fig.8 Dependence of noise on optical feedback S/N (dB) -1 -11 RELATIVE OPTICAL TO NOISE RATIO : RIN (Hz ) 10 S/N (dB) RELATIVE OPTICAL TO NOISE RATIO : RIN (Hz-1) Laser diodes 100 10 3/3 This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components.