2B455 Datasheet, PDF (1/3 Pages) Mitel Networks Corporation – VCSEL Laser Diode(Datacom)

PRODUCT INFORMATION
840nm
2B455
VCSEL Laser Diode
Datacom
This Vertical Cavity Surface-
Emitting Laser is designed for Fibre
Channel, Gigabit Ethernet, ATM and
general applications. It incorporates a
photodiode to monitor the optical
power and allow for feedback control.
Ø4.7
Ø2.55
14
0.4
VCSEL Cathode
MONITOR Anode
VCSEL
Anode
MONITOR
Cathode
2.5
5.47
CASE NOT CONNECTED
BOTTOM VIEW
TO-46 Package With Flat Window
WARNING: Laser Radiation, avoid exposure
to beam. Class 3B laser product, potential
eye hazard. Warning labels in each box.
13590.11 1999-04-01
Optical and Electrical Characteristics (25°C Case Temperature)
PARAMETER
SYMBOL MIN. TYP. MAX. UNIT TEST CONDITION
Fiber-Coupled Power
P_fiber
1.3
mW I_F =12mA (Note 1)
Optical Power
P_o 0.9 1.7 3.0 mW I_F =12mA
Slope Efficiency
(dP_o/dI_F)
Beam Divergence
␩
200
mW/A I_F =12mA
⌰
15
deg Full Width at 1/e²
Bandwidth
(3dBel )
f_c
2
GHz I_F =12mA
Peak Wavelength
␭_p 830 840 860 nm I_F =12mA
Spectral Width (FWHM)
⌬␭
0.5 1 nm I_F =12mA
Forward Voltage (Fig.5)
V_F
1.9 2.2 V I_F =12mA
Threshold Current
I_th
3.5 6 mA
Monitor Current
I_m 20 30
␮A I_F =12mA, V_R>1V
Monitor Dark Current
I_d
30 nA V_R=5V
Relative Intensity Noise RIN
-130
dB/Hz I_F =12mA, f=1 GHz
Note 1: Fiber: 50/125 Graded Index, NA=0.2 or 62.5/125 Graded Index, NA=0.275. An external glass
ball lens with 2 mm diameter is required.
Absolute Maximum Ratings
PARAMETER
Storage Temperature
Operating Temperature (derating: Fig.4)
SYMBOL
T_stg
Top
LIMIT
-55 to +125ЊC
0 to +70ЊC
Electrical Power Dissipation (derating: Fig.4)
Continuous Forward Current (fр10 kHz)
Peak Forward Current (duty cycleр50%, fу1 MHz)
VCSEL Reverse Voltage
Soldering Temperature (2mm from the case for 10 sec)
P_tot
I_F
I_FRM
V_R
T_sld
35 mW
15 mA
25 mA
1.5 V
260ЊC
Thermal Characteristics
PARAMETER
SYMBOL MIN. TYP. MAX.
Thermal Resistance - Infinite Heat Sink R_thjc
500
Thermal Resistance - No Heat Sink
R_thja
800
Temp. Coefficient -Wavelength
d␭ /dT_j
0.06
Optical Power - Variation 0 to 70ЊC
⌬P
Ϯ0.7
Threshold Current - Variation 0 to 70ЊC ⌬Ith
Ϯ0.6
UNIT
ЊC/W
ЊC/W
nm/ЊC
dB
mA
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