THORLABS M625F2 Bedienungsanleitung



February1,2018

MTN005534‐S01,RevB

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Description

Thorlabs’ M625F2 Fiber-Coupled LED has a nominal wavelength of 625 nm, outputs more than 13.2 mW of

power, and is mounted to the end of a heat sink. The output is compatible with SMA fiber connectors. This LED

needs to be supplied with a constant current that must not exceed 1000 mA.

Specifications

Specification Value

Color Red

Nominal Wavelength 625 nm

Test Current for Typical LED Power 1000 mA

Maximum Current (CW) 1000 mA

Bandwidth (FWHM) 15 nm

Electrical Power 2200 mW

Typical Lifetime >50 000 h

Operating Temperature

(Non-Condensing) 0 to 40 °C

Storage Temperature -40 to 70 °C

Emitter Size 1 mm x 1 mm

Risk GroupaRG0 – Exempt Risk Group

a. According to the standard IEC 62471:2006, Photobiological Safety of Lamps and Lamp Systems

M625F2

Symbol Min Typical Max

Dominant Wavelengtha λp 620 nm 625 nm 630 nm

LED Power Output (Ø400 µm Fiber)a,b Pout 13.2 mW 17.5 mW -

LED Power Output (Ø200 µm Fiber)a,c Pout - 5.7 mW -

Forward Voltagea VF - 2.2 V -

a. When Driven with the Test Current

b. For multimode fiber with a Ø400 µm core and 0.39 NA (Item # FT400EMT).

c. For multimode fiber with a Ø200 µm core and 0.22 NA (Item # FG200UCC).

Operating Instructions

Be sure to provide air ventilation in order to avoid overheating, drops in optical power, and reduced lifetime. Each LED

has a characteristic switch-on behavior, which depends on the LED properties and environment conditions. An important

criterion is the heat dissipation. The M625F2 has a unique thermal and heat sink design that reduces the power decay to

a minimum.

M625F2’s male connector is a standard M8 x 1 sensor circular connector. Pins 1 and 2 connect to the LED. Pins 3

and 4 are used for the internal EEPROM. Only use these connections when using a Thorlabs LED driver.

After an LED is switched on, it will warm up which can cause a decay in optical power. The heat sink of the M625F2

provides good thermal management, reducing the loss of power as the LED reaches its equilibrium temperature.

Fiber-Coupled LED

625 nm

M625F2



February1,2018

MTN005534‐S01,RevB

Optical Fiber

Fiber connection to the M625F2 must be made via an SMA fiber connector. We recommend

using multimode (MMF) fiber with the M625F2. Optical output power is specified for a Ø400 µm

MMF with an NA of 0.39 at the maximum allowed LED current. Optical power increases proportionally

with the core diameter and nearly proportionally to the square of the NA.

Performance Plots

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Drawings



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2 LED Cathode (White)

Connector Pin Out

1 LED Anode (Brown)

3 EEPROM GND (Black)

4 EEPROM I0 (Blue)

February1,2018

MTN005534‐S01,RevB

www.thorlabs.com/contact

Power Supply

We recommend using Thorlabs’ DC2200 or LEDD1B LED current drivers (for control of a single LED).

Alternatively, the DC4100 or DC4104 current driver can be used with the DC4100-HUB, which allows

simultaneous control of up to 4 individual LEDs.

If you decide to use your own DC source, please make sure that the operating current does not exceed the

maximum allowed value, sufficient forward voltage is supplied, and that the correct connection is made to

Pins 1 and 2.

Maintenance and Service

Do not stick any items into the SMA connector aperture – you may damage the LED.

The M625F2 is not water resistant and must be protected from adverse weather conditions. To avoid damage,

do not expose it to spray, liquids, or solvents. The M625F2 does not contain any parts serviceable by the user

and does not require regular user maintenance. Do not open the enclosure. If a malfunction occurs, contact

Thorlabs for return instructions.

If your fiber-coupled LED needs repair, please contact Thorlabs for return instructions.

Warnings and Safety

Inappropriate use of any Fiber-Coupled LED product may result in permanent eye damage. To prevent injury,

use this product in accordance with the International Standard “Photobiological Safety of Lamps & Lamp

Systems” IEC 62471. This product falls under Risk Group RG0 – Exempt Risk Group in accordance to the

standard IEC 62471:2006.

If using this LED in a microscope application as a replacement for mercury vapor lamp, the same precautions

should be taken.

During normal operations, the casing temperature may exceed ambient temperature by as much as 25 °C

(45 °F). To prevent higher case temperatures, the products should be operated without anything hindering air

movement around the convective cooling fins.

Please note that this product is not suitable for household room illumination.

This LED must not be operated in explosive environments and should only be used with shielded connection

cables.

All statements regarding safety of operation and technical data only apply when the unit is operated correctly

according to its specifications. The safety of any system incorporating the equipment is the responsibility of

the assembler of the system.

Warning Statement

This LED radiates intense visible light during operation. Precautions must be taken to prevent looking directly

at the light. If viewing the LED directly is necessary, protective glasses must be worn to avoid eye damage. Do

not look directly into the LED or look through the optical system during operation, as this can be harmful to

the eyes, even for brief periods of exposure due to the high intensity of the light.

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