Superluminescent LEDs break 100mW barrier, 1550nm
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jtr1962
Flashaholic
No mention of the input current or input power in that article. I'm curious as to the wall-plug efficiency of these.
idleprocess
Flashaholic
Re: Superluminescent LEDs break 100mW barrier, 155
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The company believes that the device, which emits 120 mW at 1550 nm, could penetrate applications such medical imaging, security and industrial sensing.
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Isn't 1550nm way off into the IR spectrum?
[ QUOTE ]
The company believes that the device, which emits 120 mW at 1550 nm, could penetrate applications such medical imaging, security and industrial sensing.
[/ QUOTE ]
Isn't 1550nm way off into the IR spectrum?
The_LED_Museum
*Retired*
Re: Superluminescent LEDs break 100mW barrier, 155
Yup, 1,550nm is in the lower-middle IR band as far as LEDs are concerned (740nm to 4,900nm).
Looks like the deepest IR LED I've tested was 1,300nm (1.3µm or 1.3 micrometers or 1.3 microns).
This LED outputs 2.3mW of radiant energy at 50mA drive current.
Yup, 1,550nm is in the lower-middle IR band as far as LEDs are concerned (740nm to 4,900nm).
Looks like the deepest IR LED I've tested was 1,300nm (1.3µm or 1.3 micrometers or 1.3 microns).
This LED outputs 2.3mW of radiant energy at 50mA drive current.
NewBie
*Retired*
Re: Superluminescent LEDs break 100mW barrier, 155
Pretty "long" for an IR LED, but it is way up top end of the middle IR band, most true IR imagers work around 10,000 nm (10um), though you can find some short IR thermal imagers that work in the 6,000nm to 7,000nm range.
The near IR band 750 to 1300 nm.
Intermediate IR band (also called the middle IR band)
1300 to 3000 nm.
The far IR band extends from 3,000 nm to 14,000nm.
Extreme IR band runs on out to 1,000,000 nm (or 1,000um)
The definition will vary depending on the source, for example:
Near IR: 0.7 - 1.5 mm (700nm-1,500nm)
Intermediate IR: 1.5 - 8 mm (1,500-8,000nm)
Far IR: 8 - 100 mm (8,000nm-100,000nm)
Extreme IR: 100 - 1000 mm (100,000-1,000,000nm)
btw, 1,000,000nm=1,000um=1mm
These above definitions are from Introduction to Naval Weapons Engineering, Introduction to Electro-optical systems.
A great little primer on the EO Spectrum is found here, done by Point Magu:
https://ewhdbks.mugu.navy.mil/eo-ir.pdf
Pretty "long" for an IR LED, but it is way up top end of the middle IR band, most true IR imagers work around 10,000 nm (10um), though you can find some short IR thermal imagers that work in the 6,000nm to 7,000nm range.
The near IR band 750 to 1300 nm.
Intermediate IR band (also called the middle IR band)
1300 to 3000 nm.
The far IR band extends from 3,000 nm to 14,000nm.
Extreme IR band runs on out to 1,000,000 nm (or 1,000um)
The definition will vary depending on the source, for example:
Near IR: 0.7 - 1.5 mm (700nm-1,500nm)
Intermediate IR: 1.5 - 8 mm (1,500-8,000nm)
Far IR: 8 - 100 mm (8,000nm-100,000nm)
Extreme IR: 100 - 1000 mm (100,000-1,000,000nm)
btw, 1,000,000nm=1,000um=1mm
These above definitions are from Introduction to Naval Weapons Engineering, Introduction to Electro-optical systems.
A great little primer on the EO Spectrum is found here, done by Point Magu:
https://ewhdbks.mugu.navy.mil/eo-ir.pdf
Re: Superluminescent LEDs break 100mW barrier, 155
Thanks for the link to the EO primer. I downloaded and am printing it. Just a quick reading of the little 22 page handbook has already atleast doubled what I knew about EO.
That's about the best graph I've seen explaining the light spectrum.
Britt
Thanks for the link to the EO primer. I downloaded and am printing it. Just a quick reading of the little 22 page handbook has already atleast doubled what I knew about EO.
That's about the best graph I've seen explaining the light spectrum.
Britt
