SPECTRA OF 450nm BROADBAND BLUE LEDS
DRIVEN AT HIGH IF SHORT DUTY CYCLE


This web page will be for nothing but spectra of 5mm broadband blue LEDs (driven at >900mA with short duty cycle pulses to show the superluminescent UVA spectral feature):

Ocean Optics USB2000 Spectrometer donated by P.L.
As of 10-10-07, I've been using a PC2000-ISA Spectrometer from Ocean Optics that I received several years ago, but that I didn't have a home for until now.
As of 03-08-08, I once again have the USB2000 Spectrometer, enabling color spectra again.
As of 09-19-09, I no longer have the PC2000-ISA; it was sold to prevent an eviction.



BLUE

Spectrographic analysis
Spectrographic analysis of a Fox 3mm blue LED, high current.
Used pulses of 1µS with a 200µs pause between each (0.5% duty cycle); up to 900mA per pulse.
Note the superluminescent emission at ~365nm when pulsed at high current.


Spectrographic analysis
Spectrographic analysis of a Nichia NLPB MQW blue LED, high current.
Used pulses of 1µS with a 200µs pause between each (0.5% duty cycle); up to 900mA per pulse.
Note the superluminescent emission at ~385nm when pulsed at high current.


Spectrographic analysis
Spectrographic analysis of a Panasonic 450nm broadband blue LED, high current.
Used pulses of 1µS with a 200µs pause between each (0.5% duty cycle); up to 900mA per pulse.
Note the strong superluminescent emission at ~385nm when pulsed at high current.


Spectrographic analysis
Spectrographic analysis of a Nichia NSPB500 broadband blue LED; circa. 1998, high current.
Used pulses of 1µS with a 200µs pause between each (0.5% duty cycle); up to 900mA per pulse.













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