US Patent 10541506 Conjugated polymer laser with temperature-controlled power output

The conjugated polymer laser with temperature-controlled power output uses a triphenylamine dimer-based conjugated polymer as the laser medium to produce an output laser beam having a beam energy tunable between approximately 20 μJ and approximately 325 μJ over a temperature range of the triphenylamine dimer-based conjugated polymer between approximately 40° C. and approximately 85° C. The triphenylamine dimer-based conjugated polymer laser medium is a solution of poly[N,N′-bis(4-butylphenyl)-N,N′-bisphenylbenzidine], known as poly-TPD(4B), dissolved in toluene. Poly-TPD(4B) has a long side chain of butyl (C4H9), providing temperature-dependent dimerization, which may not be found with shorter chains of butyl, such as in poly-TPD(4E) or poly-TPD(4M). The molar concentration of the poly-TPD in the solution is between approximately 5 μM and approximately 100 μM. Additional adjustable tuning of the molar concentration of the poly-TPD in the solution provides for wavelength tuning of the output laser beam between approximately 415 nm and approximately 445 nm.