Abstract
Amplified spontaneous emission( ASE) properties of organic material En BOD were studied under ultraviolet pulse laser pumping. En BOD sample in dilute toluene solution shows narrowband absorption and PL spectra,with the maximum peak located at 508 nm and 527 nm,respectively.The ASE efficiency changes with the solution concentration. The maximum ASE efficiency of 22. 6%was obtained when the En BOD sample concentration is 0. 008 mol·L- 1,in which the ASE threshold is 29. 5 k W·cm- 2,ASE peak is 542 nm and full width at half maximum is about 12. 4 nm.The ASE output intensity attenuated to 61. 2% of the initial strength under the pulse pump frequency of 200 000. The results indicated that En BOD is a kind of laser material with low ASE threshold and good light stability.
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