Item #	Color (Click for Spectrum)^a	Nominal Wavelength^b	LED Output Power (Typical)^c
M365F1	UV	365 nm	4.1 mW
M385F1	UV	385 nm	10.7 mW
M405F1	UV	405 nm	3.7 mW
M420F1	Violet	420 nm	1.7 mW
M455F1	Royal Blue	455 nm	11.0 mW
M470F1	Blue	470 nm	10.1 mW
M490F1	Blue	490 nm	2.3 mW
M505F1	Cyan	505 nm	8.0 mW
M530F1	Green	530 nm	5.1 mW
M565F1	Yellow	565 nm	2.0 mW
M590F1	Amber	590 nm	3.2 mW
M617F1	Orange	617 nm	10.8 mW
M625F1	Red	625 nm	10.1 mW
M660F1	Deep Red	660 nm	14.5 mW
M735F1	Far Red	735 nm	1.9 mW
M780F1	IR	780 nm	1.5 mW
M850F2	IR	850 nm	13.4 mW
M880F1	IR	880 nm	2.8 mW
M940F1	IR	940 nm	6.5 mW
M970F1	IR	970 nm	0.2 mW
M1050F1	IR	1050 nm	1.4 mW
MWWHF1	Warm White	3000 K	7.0 mW
MCWHF1	Cold White	5600 K	7.0 mW

Due to variations in the manufacturing process and operating parameters such as temperature and current, the actual spectral output of any given LED will vary. Output plots and center wavelength specs are only intended to be used as a guideline. Click here to download spectrum data.
The nominal wavelength indicates the wavelength at which the LED appears brightest to the human eye. This may not correspond to the peak wavelength as measured by a spectrograph.
Typical Power for MM Fiber with Ø400 µm core, 0.39 NA. See the Output Power tab for more output power test data.

Fiber-Coupled LED Features

UV, Visible, and NIR Versions Available
Integrated Identification Chip (EEPROM) Stores LED Operating Parameters
Optimized Thermal Properties Lead to Stable Output Power
SMA Connectors are Ideal for use with Multimode Fiber Optic Patch Cables

Each fiber-coupled LED consists of a single, high-power LED that is coupled to the optical fiber using a technique called butt-coupling. During this process, the fiber connector is positioned so that the end of the fiber is as close as possible to the emitter, thereby minimizing losses at the fiber input and maximizing output power. The coupling efficiency is primarily dependent on the core diameter and the numerical aperture (NA) of the connected fiber. Larger core diameters and higher NA values give rise to reduced losses and increased output power at the end of the fiber.

Each LED is equipped with an integrated EEPROM (read-only memory) chip storing information about the LED (e.g., current limit, wavelength, and forward voltage) that can be read by Thorlabs' DC2100, DC4100, and DC4104 Controllers (the latter two require the DC4100-HUB). These drivers, which can modulate the LED at a rate of up to 100 kHz, can automatically adjust the maximum current setting based on the information stored in the EEPROM chip to protect the connected LED. A fourth diver, the LEDD1B, is capable of providing LED modulation frequencies up to 5 kHz, but is not capable of reading information from the EEPROM chip. For more information about all of these LED drivers, see the LED Drivers tab.

Optimized Thermal Management
These high-power, fiber-coupled LEDs possess good thermal stability properties. The large, passively cooled heat sink is in direct contact with the metal core circuit board on which the LED is mounted. This minimizes the degredation of optical output power caused by increased LED junction temperature.

Optogenetics Applications
Our fiber-coupled LEDs are ideal light sources for optogenetics applications. They feature a variety of wavelength choices and a convenient interconnection. Additionally, up to four different light sources can be driven and modulated simultaneously with our DC4100 controller and DC4100-HUB hub. Click here for our entire line of optogenetics products.

Item #	Color (Click for Spectrum)^a	Nominal Wavelength^a,b	Minimum Power LED Output^c	Typical Power LED Output^c	Test Current for LED Power	Maximum Current (CW)	Forward Voltage	Halfwidth (FWHM)	Typical Lifetime
M365F1	UV	365 nm	3.0 mW	4.1 mW	700 mA	700 mA	4.4 V	7.5 nm	>10,000 h
M385F1	UV	385 nm	9.0 mW	10.7 mW	700 mA	700 mA	4.3 V	10 nm	>10,000 h
M405F1	UV	405 nm	3.0 mW	3.7 mW	500 mA	500 mA	3.6 V	12 nm	>10,000 h
M420F1	Violet	420 nm	1.6 mW	1.7 mW	500 mA	500 mA	3.6 V	12 nm	>10,000 h
M455F1	Royal Blue	455 nm	9.5 mW	11.0 mW	1000 mA	1000 mA	3.2 V	25 nm	>50,000 h
M470F1	Blue	470 nm	8.0 mW	10.1 mW	1000 mA	1000 mA	3.6 V	25 nm	>50,000 h
M490F1	Blue	490 nm	2.0 mW	2.3 mW	350 mA	350 mA	3.5 V	25 nm	>10,000 h
M505F1	Cyan	505 nm	7.0 mW	8.0 mW	1000 mA	1000 mA	3.3 V	30 nm	>50,000 h
M530F1	Green	530 nm	4.0 mW	5.1 mW	1000 mA	1000 mA	3.6 V	33 nm	>50,000 h
M565F1	Yellow	565 nm	1.8 mW	2.0 mW	500 mA	500 mA	3.2 V	80 nm	>10,000 h
M590F1	Amber	590 nm	2.5 mW	3.2 mW	1000 mA	1000 mA	2.5 V	18 nm	>50,000 h
M617F1	Orange	617 nm	9.0 mW	10.8 mW	1000 mA	1000 mA	2.5 V	18 nm	>50,000 h
M625F1	Red	625 nm	8.0 mW	10.1 mW	1000 mA	1000 mA	2.5 V	18 nm	>50,000 h
M660F1	Deep Red	660 nm	13.0 mW	14.5 mW	1000 mA	1000 mA	2.15 V	25 nm	>50,000 h
M735F1	Far Red	735 nm	1.6 mW	1.9 mW	500 mA	800 mA	1.9 V	25 nm	>10,000 h
M780F1	IR	780 nm	1.3 mW	1.5 mW	500 mA	800 mA	2.0 V	25 nm	>10,000 h
M850F2	IR	850 nm	10.5 mW	13.4 mW	1000 mA	1000 mA	3.0 V	30 nm	>50,000 h
M880F1	IR	880 nm	2.4 mW	2.8 mW	1000 mA	1000 mA	1.7 V	50 nm	>10,000 h
M940F1	IR	940 nm	5.5 mW	6.5 mW	1000 mA	1000 mA	1.4 V	30 nm	>50,000 h
M970F1	IR	970 nm	0.2 mW	0.2 mW	600 mA	600 mA	1.4 V	45 nm	>10,000 h
M1050F1	IR	1050 nm	1.1 mW	1.4 mW	700 mA	700 mA	1.5 V	60 nm	>10,000 h
MWWHF1^d	Warm White	3000 K	6.0 mW	7.0 mW	1000 mA	1000 mA	3.5 V	N/A	>10,000 h
MCWHF1^d	Cold White	5600 K	6.0 mW	7.0 mW	1000 mA	1000 mA	3.6 V	N/A	>50,000 h

Due to variations in the manufacturing process and operating parameters such as temperature and current, the actual spectral output of any given LED will vary. Output plots and center wavelength specs are only intended to be used as a guideline. Click here to download spectrum data.
The nominal wavelength indicates the wavelength at which the LED appears brightest to the human eye. This may not correspond to the peak wavelength as measured by a spectrograph.
Typical Power for MM Fiber with Ø400 µm core, 0.39 NA. See the Output Power tab for more output power test data.
The MWWHF1 and MCWHF1 LEDs may not turn off completely when modulated at frequencies above 5 kHz, as the white light is produced by optically stimulating emission from phosphor.

Output Power with Connected Multimode Patch Cables

The below table lists the minimum optical power values measured at the output of different fibers that were coupled to a M530F1 LED driven at 1000 mA. This can be used as an estimation for the usable power for all the fiber-coupled LEDs sold below when connected to a multimode patch cable.

Part #	Fiber	Core Size	NA	Min. Power
M14L0x	AFS50/125Y	Ø50 µm	0.22	0.022 mW
M15L0x	AFS105/125Y	Ø105 µm	0.22	0.09 mW
M16L0x	AFS50/125Y	Ø50 µm	0.22	0.02 mW
M18L0x	AFS105/125Y	Ø105 µm	0.22	0.097 mW
M19L0x	UM22-200	Ø200 µm	0.22	0.52 mW
M22L0x	UM22-400	Ø400 µm	0.22	1.54 mW
M25L01	FG200LCC	Ø200 µm	0.22	1.34 mW
M25L02	FG200LCC	Ø200 µm	0.22	1.2 mW
M25L05	FG200LCC	Ø200 µm	0.22	0.95 mW
M28L01	FT400EMT	Ø400 µm	0.39	3.99 mW
M28L02	FT400EMT	Ø400 µm	0.39	3.34 mW
M28L05	FT400EMT	Ø400 µm	0.39	3.58 mW
M29L0x	FT600EMT	Ø600 µm	0.39	7.34 mW
M35L0x	FT1000EMT	Ø1000 µm	0.39	17.61 mW
M37L0x	FG550LEC	Ø550 µm	0.22	6.86 mW
M38L0x	FT200EMT	Ø200 µm	0.39	0.861 mW
M40L0x	BFL48-400	Ø400 µm	0.48	5.06 mW
M41L01	BFL48-600	Ø600 µm	0.48	10.66 mW
M41L02	BFL48-600	Ø600 µm	0.48	9.73 mW

Compatible Drivers	LEDD1B	DC2100^a	DC4100^{a, b, c}	DC4104^{a, b, c}
Click Photos to Enlarge
Max LED Driver Current Output	1.2 A	2.0 A	1.0 A per Channel	1.0 A per Channel
Max Modulation Frequency Using External Input	5 kHz	100 kHz^d	100 kHz^d (Simultaneous Across all Channels)	100 kHz^d (Independently Controlled Channels)
Interface	Analog	USB 2.0	USB 2.0	USB 2.0
Main Driver Features	Very Compact Footprint 60 mm x 73 mm x 104 mm (W x H x D)	Individual Pulse Width Control	4 Channels^c	4 Channels^c
EEPROM Compatible: Reads Out LED Data for LED Settings	-	x	x	x
LCD Display	-	x	x	x

Automatically limits to LEDs max current via EEPROM readout.
LED sources with a forward voltage of greater than 5 V are not compatible with DC4100 or DC4104.
The DC4100 or DC4104 can power and control up to four LEDs simultaneously when used with the DC4100-HUB. The LEDs on this page all require the DC4100-HUB when used with the DC4100 or DC4104.
The MWWHF1 and MCWHF1 LEDs may not turn off completely when modulated at frequencies above 5 kHz, as the white light is produced by optically stimulating emission from phosphor.

Note: The LEDs sold on this page are not compatible with the DC3100 driver sold with our Modulated LEDs for FLIM Microscopy kits.

Pin	Specification	Color
1	LED Anode	Brown
2	LED Cathode	White
3	EEPROM GND	Black
4	EEPROM IO	Blue

Pin Connection
The diagram to the right shows the male connector of the fiber-coupled LED assembly. It is a standard M8 x 1 sensor circular connector. Pins 1 and 2 are the connection to the LED. Pin 3 and 4 are used for the internal EEPROM (electrically erasable programmable read-only memory) in these LEDs. If using an LED driver that was not purchased from Thorlabs, be careful that the appropriate connections are made to Pin 1 and Pin 2 and that you do not attempt to drive the LED through the EEPROM pins.

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Posted Comments:

Poster: jlow

Posted Date: 2012-09-26 09:52:00.0

Response from Jeremy at Thorlabs: The 5.1mW is the typical output power when using a Ø400µm core fiber with 0.39 NA with 1000mA drive current. When a larger core fiber such as the M35L0x (Ø1000µm, 0.39NA) is used, the coupling efficiency from the LED to the fiber is increased, hence the 17.61mW min. power.

Poster: tpth

Posted Date: 2012-09-26 09:27:45.0

Dear Sir: I have a question: Why the mininmum power 17.61mW (in a table)can be obtained when you use 530nm LED with a fiber M35L0x, though input power is 5.1mW? I need a precise estimation of the amount of decrease in LED power during propagating in a fiber. Please let me know the correct answer before my order. Best regards. Tsutomu Hoshimiya, Prof. Tohoku Gakuin University

Poster: jvigroux

Posted Date: 2012-06-06 11:13:00.0

A response from Julien at Thorlabs: Thank you for your inquiry! There will always be a trade-off to be found between fiber diameter and/or NA (ie. beam quality) and optical power coupled into the fiber. When using a fiber having a NA of 0.39, the focal length for the collimation lens to be used should be about 1mm. The beam quality that would however result from the combined effect of such a short focal length and the fiber diameter would lead to quite high divergence. In you case, I would recommend using a somewhat longer focal length for the collimation lens and subsequently a beam expander for the beam diameter reduction. I will contact you to discuss further the exact requirements of your setup to find what the most suited solution would be.

Poster: igkiou

Posted Date: 2012-06-06 04:37:26.0

Hi, I am interested in creating a very collimated white beam of diameter < 0.8 mm. MCWHF1 provides enough output power when used with the fiber you used for your tests, a MM 400 um 0.39 NA fiber. What would you recommend using for collimation of the output of this combination? Would you recommend any of your prepackaged collimators? Thank you in advance for your assistance.

Poster: tcohen

Posted Date: 2012-05-14 09:18:00.0

Response from Tim at Thorlabs: Thank you for your interest in our products. Our sales department will contact you to provide you with an official quote.

Poster: emlee1

Posted Date: 2012-05-13 12:32:44.0

I am interested to purchase this product. Can you email me the quotation for this product and a suitable power supply for use in Singapore? Do include shipping to Singapore as well in your quote. Thanks.

Poster: jvigroux

Posted Date: 2012-02-06 13:00:00.0

A response from Julien at Thorlabs: thank you for your inquiry! Unfortunately, as of now, there is no LED available with a high enough power in the wavelength range. I will ocntact you to know your exact requirement sin order to see which alternative there could be.

Poster: kforsyth

Posted Date: 2012-02-06 11:37:11.0

Any plans for going shorter in wavelength soon, say to 250 - 300 nm?

Poster: jvigroux

Posted Date: 2011-12-15 10:17:00.0

A response from Julien at Thorlabs: I just measured the coupled power in a 460HP fiber from a MCWHF1. The output power out of the fiber was around 50nW. In comparison, a 400µm 0.39NA fiber would yield an output power of around 7mW.

Poster: doerr

Posted Date: 2011-12-14 17:22:01.0

Hi, I need a white light source coupled to a single-mode fiber. I've tried with regular halogen bulbs, but the output power is at least 10 times to low. The white light LED would be an option, even though the spectral distribution is not optimal. Can you give me any numbers what coupling efficiency or output power I can expect from a LED coupled to a single-mode fiber? Fiber type would be the same as with the 460HP patch cords.

Poster: jvigroux

Posted Date: 2011-12-14 11:52:00.0

A response from Julien at Thorlabs: thank you for your inquiry! We do not have the value yet but I will perform the measurement by tomorrow and let you know the obtained value.

Poster: jvigroux

Posted Date: 2011-08-29 12:21:00.0

A response from Julien at Thorlabs: thank you for your feedback. We are in the process of measuring the power coupled into different standard fibers using the fiber coupled LEDs. Before publishing those values however, the tests have to be ran until the end and critically assessed. I will contact you directly per email in order to discuss with you the values that can be expected for your configuration.

Poster: rhs

Posted Date: 2011-08-22 12:50:51.0

I miss some guidelines for choosing the optimal delivery fiber. Your measurement data has been obtained using a 400µm/0.4NA MM fiber, but that doesnt say much about the performance when using a different fiber. It would be extremely helpful to have just two graphs showing the spatial distribution and the angular distribution of intensity at the coupling plane. Thank you.

Poster: jjurado

Posted Date: 2011-08-05 09:30:00.0

Response from Javier at Thorlabs to last poster: Thank you very much for your feedback!The mounts for these fiber-coupled LEDs have been designed to accept for M6 and 1/4" diameter screws. We will take a look at our current units to make sure that both screws fit and will make changes if it turns out that 1/4" screws are not compatible. Regarding the marking of the center wavelength, there is actually an identification label on the back side of the device with the part number of the LED, which calls out the center wavelength (with the exception of the MCWHF1 cold white LED). Please contact us at techsupport@thorlabs.com if you have any further questions or comments.

Poster:

Posted Date: 2011-08-02 18:32:35.0

The mounting slots are designed for M6 screws and dont pass 1/4" screws that are used in the USA. It would also be nice to have the center wavelength engraved on the housing, either on the front surface, or on the top edge.

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