Dear all,
at the moment we have no pulse Xe lamp to study decay kinetics of lanthanide(III) complexes. Is it possible to generate short (milli- or micro- or even subsecond range) pulses from permanent Xe lamp using laser focused on the lamp?
We work a lot with laser induced plasmas, particularly in Xe arc lamps.
You can easily produce light pulse from Xe lamp with adequate laser.
So you need Q-switched 1 um wavelength solid state laser, Nd3+ or Yb3+, or fiber laser of pulse energy around 1 mJ, pulse width about 10 ns. Just focus the laser beam inside Xe lamp with short focus lens (maybe not very short, focusing number, or f/d, where f - focal distance, d -beam diameter, may be in the limits 3-10 or 15-50 mm for 5 mm dia beam) and you will get so called laser spark or laser induced breakdown. Please refer to LIBS or Laser Induced Breakdown Spectroscopy - you will find a lot of literature on the subject. The only condition you must have in lamp - high pressure to get highly luminous laser spark. Standard short arc lamps OSRAM XBO 75W, XBO 100W or XBO 150W are under 12 to 15 bar Xe in cold bulb (the higher is power (W), the lower is pressure). If you need shorter wavelength UV for your experiments, you should get a lamp with a bulb of ordinary fused silica (not ozone-free, mark OFR should not be on the lamp cap) or much better of Suprasil (fused silica with enhanced UV transmission). Suprasil lamps are of special production, more than twice price of ordinary lamps of the same size and power. OSRAM XBO 150W/4 SUPRASIL maxUV is one of standard resonable price lamps made of Suprasil.
Dear Rustem,
The decay or time resolved spectrum from lanthanide(III) complexes normally are in the order of microseconds or milliseconds. Therefore you can't use any lamp which has similar response order to do it for your purpose. Why not use pulse lasers which emitting wavelength could be absorbed by the complex compounds?
We work a lot with laser induced plasmas, particularly in Xe arc lamps.
You can easily produce light pulse from Xe lamp with adequate laser.
So you need Q-switched 1 um wavelength solid state laser, Nd3+ or Yb3+, or fiber laser of pulse energy around 1 mJ, pulse width about 10 ns. Just focus the laser beam inside Xe lamp with short focus lens (maybe not very short, focusing number, or f/d, where f - focal distance, d -beam diameter, may be in the limits 3-10 or 15-50 mm for 5 mm dia beam) and you will get so called laser spark or laser induced breakdown. Please refer to LIBS or Laser Induced Breakdown Spectroscopy - you will find a lot of literature on the subject. The only condition you must have in lamp - high pressure to get highly luminous laser spark. Standard short arc lamps OSRAM XBO 75W, XBO 100W or XBO 150W are under 12 to 15 bar Xe in cold bulb (the higher is power (W), the lower is pressure). If you need shorter wavelength UV for your experiments, you should get a lamp with a bulb of ordinary fused silica (not ozone-free, mark OFR should not be on the lamp cap) or much better of Suprasil (fused silica with enhanced UV transmission). Suprasil lamps are of special production, more than twice price of ordinary lamps of the same size and power. OSRAM XBO 150W/4 SUPRASIL maxUV is one of standard resonable price lamps made of Suprasil.
Thanks to Xuhua Wang and especially to Mikhail Yu. Yakimov for valuable answers. It was of paramount importance for me to receive your helpful comments.
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