Hi Everyone,
I have spoke with a couple of helpful people from Coherent and here is what I learned about the soon to be released (Sept./Oct. 2002) 200mW Sapphire 488nM laser.
Its operating characteristics are the same as the 20mW version shown at ISAC this year. The laser is not a traditional Sapphire laser. It is an optically pumped semiconductor laser whose technology was developed for the communications market. The optical pump is a 800nM, high power,diode laser which pumps another semiconductor device (InGaAs) which emits around 980nM. This 980nM light is then frequency doubled to produce the 488nM output wavelength.
A few specs(200mW specs not yet available but 20mW is comparable as informed):
488nM 20mW Sapphire Innova 304C 488nM
Beam diameter @ 1/E2 0.7mm+/-.05mm 1.5mm
Spatial Mode TEMoo M2<1.1 TEMoo M2<1.1
Beam Divergence <1.2mrad 0.5mrad
Optical Noise <.25% 0.2%
(RMS 20Hz to 2MHz)
Power stability <2% (2 hours+/-3 C) +/-1% (8 hours with power track)
The M2 (M Squared) value above is a way to measure beam quality. It is the ratio of a laser beam's actual diameter divergence product, to the ideal TEMoo beam diameter divergence product.
The packaging for the 200mW Sapphire is small (head the size of a paperback book), with low power consumption and heat dissipation. No answer yet on power range adjustments. I did not get an exact quoted price, but was told it should be in the range of high $20's to low $30's K.
If laser manufactures are producing lower wavelength, higher power lasers, that come in smaller packages with good beam quality this could and should change the flow cytometer. Maybe we will soon see a multi-line package whose laser heads are as easy to change as emission filters.
Regards,
Ray
Raymond Lannigan
Cytek Development
19331 Briar Patch Dr.
Gordonsville, VA 22942
540-832-2793
540-832-2794 (fax)
434-531-3607 (cell)
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