IR Opolette 2940

IR Opolette 2940 side view.
IR Opolette 2940 side view.
Another laser and the second from OPOTEK this year: an IR Opolette 2940. It is fixed wavelength at 2940 nm for no other reason than that is the Er:YAG laser wavelength. It is possible to manually adjust the internal optics to generate light from 2700 to 3100 nm.

OPOTEK IR Opolette head (right) and Quantel
OPOTEK IR Opolette head (right) and Quantel

This laser has its roots in the STTR grant that I had with OPOTEK starting in 2001 (awarded when I was at Emory but moved immediately to LSU in the first year of Phase I). Our goal was to build an OPO with the capabilities of the Mirage 3000B but in a smaller package.

OPOTEK Opolette 2940 laser head.
OPOTEK Opolette 2940 laser head.

The left port gives access to the Nd:YAG laser fundamental at 1064 nm and the right port is the 2940 nm mid-IR at about 3 mJ per pulse at 20 Hz. Plenty of energy when focused to efficiently ablate thin films (similar to our wavelength tunable IR Opolette which you can see ablating things here.)

ASMS 2013

Kermit Murray at ASMS 2013
ASMS 2013: Final Report on the IUPAC Recommendation on Definitions of Terms Relating To Mass Spectrometry
2013 American Society for Mass Spectrometry meeting - Chinthaka Seneviratne
2013 American Society for Mass Spectrometry meeting - Thabiso Musapelo
2013 American Society for Mass Spectrometry meeting - Yonathan Merid
2013 American Society for Mass Spectrometry meeting - Fan Huang

Static Droplet Macro Photos

Macro photographs of droplets for laser ablation sample transfer.

Top-view of droplet suspended above laser alblation target
Wide-view of droplet suspended above laser alblation target
Side-view of droplet suspended above laser alblation target, December 2010
Closeup of droplet suspended above laser alblation target
Droplet suspended above laser alblation target

McNeese March 2009

In March of 2009, I visited McNeese State University in Lake Charles, Louisiana to give a talk and visit my collaborator Prof. Mark Merchant, “the alligator man”. Mark gave me a tour of his alligator holding facilities on campus.

Alligator in pen at McNeese State University, March 2009

Mark wanted to get this alligator to open its mouth so that I could get a good photo.

Prof. Mark Merchant with an alligator at McNeese State University March 2009
Prof. Mark Merchant with an alligator at McNeese State University March 2009

Sure enough, the alligator did open his mouth. Note Chemistry Department Head Ron Darbeau who was on the proper side of the fence during all of this. I was 15 feet away and the gate was open.

Prof. Mark Merchant testing alligator stimulus and response at McNeese State University March 2009.
Alligator at McNeese State University March 2009

In the next cage over, Mark scooped out a handful of baby alligators.

Prof. Mark Merchant with baby alligators at McNeese State University March 2009

I call the one on the right “Bitey” – he clamped down on my knuckle when I unwisely offered it to him.

Baby Alligators at McNeese State University March 2009