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High Pulse Rate IR Source

EOC offers a series of miniature pulsed infrared (IR) light sources with high intensity and ability to pulse at high frequencies. Their emission spectrum is that of a gray body.  These IR sources use patented a-CNC films as multilayer thermoresistive elements (see below).  The a-CNC's durability makes it possible to have a 2 micron thick element with very low thermal mass that allows rapid heating and cooling for pulsing at higher frequencies than any other technology can do.
 
The key advantages of these pulsed sources are:


 

Related Products:
Thermopile Detectors / Sensors
Infrared Filters

Wide Spectral Output
1 - 20 μm provides the widest emission spectrum
 
High Efficiency
With emissivity of >0.8 the spectrum is close to that of a black body
 
Fast Response
These IR sources can be modulated at a frequency of over 100 Hz because the sources' membranes are only 2 microns thick with very low thermal mass.
 
Operates at Higher Temperatures
Achieves its efficiency by operating at a higher temperature than competing technologies

Long Life and Cost Effective
With a lifetime of up to 25,000 hours and absence of any need for separate modulation, maintenance and product cost are reduced

Windows for Explosive Gases and Harsh Environments
EOC offers as an option detectors with windows for applications with explosive gasses or harsh environments

Custom Design
Custom designed IR sources are available

Unique technology
These IR sources are based on proprietary conducting amorphous carbon nanocomposite (a-CNC) films as multilayer thermoresistive elements. High emissivity, high thermal conductivity and low thermal mass (2 microns thick) made possible by the high strength of the a-CNC material allow rapid heating and cooling for pulsed operations at higher frequencies than can be achieved with competing technologies. The IR pulsable light sources are fabricated using MEMS technology.

Schematic cross section of the infrared light source chip and the source mounted in a TO-5 housing.
(1) Bonding pads: (2) a-CNC multilayer membrane; (3) silicon support; (4) active emitter area.

Technical Notes on a-CNC: Nanoamorphous Carbon Coatings (pdf)

Applications:

IR sources for infrared gas detectors for industrial, consumer, research and medical applications:

To avoid damaging the IR sources during soldering and cleaning, consider using Sockets.

Size
mm/mm
2
Modulation
Frequency
Hz
Modulation
Depth
Input Power
Typ/Max  mW
Drive C & V
Typ/Max mA/V
Effective Optical Gain Lifetime
@ 605 C
Package
2.2 x 2.2
4.8
1 - 100 99%@10Hz
50%@70Hz
770 / 1000 130mA / 5.9V
149mA / 6.7V
  100,000
hrs
TO-5
TO-39
 8 - 10 X
  KD-DBOG-18
1.7 x 1.7
2.89
1 - 100 99%@10Hz
50%@100Hz
690 / 900 117mA / 5.9V
134mA / 6.7V
  TO-5
TO-39
 8 - 10 X

 

Windows  λ Range - μm
Can Only, No Window  
Sapphire 0.1 - 5.0
CaF2 1.5 - 10
BaF2 0.2 - 11
Silicon with AR coating 1.1 - 14

Technical Notes:

Frequently Asked Questions
Frequency vs. Modulation Depth
Operating Guidelines & Power vs. Frequency (pdf)
End-of-Life Measurements (pdf)
Lifetime and Temperature vs Durability (pdf)
Nanoamorphous Carbon Coatings (pdf)
Beam Angular Distribution (pdf)
Temperature Distribution (pdf)
Temperature vs. Lifetime & Input Power (pdf)