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Nichia NDB7875 Datasheet
Blue Laser Diode
Multi Transverse Mode
• Can Type:
9.0 mm Floating Mounted with Protection device
Absolute Maximum Ratings
Forward Current (Tc=25
If 1.7 A
Allowable Reverse Current (Tc=25
Storage Temperature Tstg -40 ~ 85
Operating Case Temperature Tc 0 ~ 50
Initial Electrical/Optical Characteristics
Optical Output Power If=1.2A Po 1.1 1.6 – W
() are reference figures
Dominant Wavelength If=1.2A
435 – 455 nm
Threshold Current CW Ith 80 – 220 mA
Slope Efficiency CW
1.0 – 2.0 W/A
Operating Voltage If=1.2A Vop 3.7 – 5.5 V
5 14 25 deg.
Full Angle (
30 44 50 deg.
-5.0 – 5.0 deg.
This model does not have Photo Diode.
This model has a protection device
built in as a protection circuit against
All figures in this specification are measured by Nichia’s method and may contain measurement deviations.
The above specifications are for reference purpose only and subjected to change without prior notice.
Safety of Laser light
Laser Light can damege the human eyes and skin.
Do not expose the eye or skin to any
laser light directly and/or through optical lens. When handling the LDs, wear appropriate
safety glasses to prevent laser light, even any reflections from entering to the eye. Focused
laser beam through optical instruments will increase the chance of eye hazard.
These LDs are classified in
Class 4 of IEC60825-1 and 21 CFR Part 1040.10 Safety
. It is absolutely necessary to take overall safety measures against User’s
modules, equipment and systems into which Nichia LDs are incorporated and/or integrated.
491 Oka, Kaminaka-Cho, Anan-Shi, TOKUSHIMA 774-8601, JAPAN
PHONE: +81-884-22-2311 FAX: +81-884-21-0148
TOKYO SALES OFFICE
13F Tamachi Center Building 34-7, Shiba 5-Chome, Minato-Ku, TOKYO 108-0014, JAPAN
PHONE: +81-3-3456-3108 FAX: +81-3-5440-7330
(1) Operating method
The LD shall change its forward voltage requirement and optical output power according to temperature change. Also, the
LD will require more operation current to maintain same output power as it degrades.
Confirm that electrical spike current generated by switching on and off does not exceed the maximum operating current
level specified herein above as absolute max rating. Also, employ appropriate countermeasures to reduce chattering and/or
overshooting in the Circuit.
ACC(Auto Current Control) mode is recommended for the Product operation. Also, please be careful for the overshooting
in order to avoid excessive optical output power as the laser operation is started.
(2) Static Electricity
Static electricity or electrical surges will reduce and degrade the reliability of the LDs. It is recommended to use a wrist
strap or anti-electrostatic glove when handling the Product.
(3) Absolute Maximum Rating
Active layer of LDs shall have high current density and generate high electric field during its operation. In order to
prevent excessive damage, the LD must be operated strictly below Absolute Max Rating.
Nichia LDs described in this brochure are intended to be used for ordinary electronic equipment (such as office equipment,
communications equipment, measurement instruments and household appliances). Consult Nichia’s sales staff in advance
for information on the applications in which exceptional quality and reliability are required, particularly when the failure or
malfunction of the LDs may directly jeopardize life or health (such as for airplanes, aerospace, submersible repeaters,
nuclear reactor control systems, automobiles, traffic control equipment, life support systems and safety devices).
The Purchaser must acknowledge that any LD can be failed statically and must design its equipments fail safe design. Prior
to use of the LD, please confirm that the LD, as described in Nichia’s specifications, meets the life expectancy needs of, and
provides the features required by the Circuit and any related modules, equipment and/or systems.
Due to its short wavelength and high optical output power, optical depositions on optical path may occur depending on
surrounding conditions. Appropriate design or countermeasures should be used to avoid optical depositions.
Nichia prohibit Purchaser from reverse engineering, disassembling, or taking any other steps to derive the structure or
design of the LD.
The appearance and specifications of the product may be modified for improvement without notice. The formal
specifications must be exchanged and signed by both parties before large volume purchase begins.
No unauthorized transmission or reproduction of this document, either in whole or in part, is permitted.
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