The invention provides a continuous-wave pumped polymer laser and preparation method thereof, comprising: coating an organic polymer solution onto a substrate to form an polymer film, and applying a template having a distributed feedback structure to the polymer film, or coating an organic polymer solution onto a substrate having a distributed feedback structure to form an polymer film, and applying a plate to the polymer film; heating the substrate to reach above the phase transition temperature of the organic polymer, and applying a pressure to the template or plate for 1-100 min; and cooling the substrate to reach below the phase transition temperature of the organic polymer, and removing the template or plate from the organic polymer. The method of the invention is simple, the organic polymer molecular chain and supramolecular structure are oriented to have long range order, and the obtained laser can use continuous-wave pumping.

Provided are a device and method for fabricating an optical fiber Bragg grating, comprising a laser device, a laser shaping device, a laser interference device, a clamping movable device, and an organic-solution filling device; a liquid filling port of the clamping movable device is connected to the output port of the organic-solution filling device; the laser device emits laser light to the laser shaping device; the laser shaping device shapes the laser light, then transmits it to the laser interference device; the laser interference device splits the laser into two laser beams; the two laser beams interfere and periodically distributed laser interference fringes are obtained; the organic-solution filling device fills and attaches the organic solution to the surface of the inner wall of an hollow-core fiber; the clamping movable device moves the hollow-core fiber.

Embodiments of this invention relate to and, more particularly, to solid state lighting, digital displays, conversion of electrical energy to light, low onset gain saturated stimulate emission, light production with high efficiency and high output per area, and light production while limiting material degradation, and may also be applied in optical or quantum information processing and networking. Embodimenta of this invention comprise spectroscopic configurations having a radiative transition to a depopulated state and an optical configuration having sufficient Q such that the combination allows onset of gain saturation with a small excited state population or low current density, thus enabling production of light in a mode with near total output coupling, high efficiency, high output, low roll-off and attenuation of losses and degradation processes.

A printing head module, system and method for printing laser light sources. The printing head module comprises one or more printing heads used for printing a plurality of laser light sources on a substrate successively or once for all; ink used for printing comprises a luminescent dye and a host material, as well as a solvent. The system comprises a printing head module and an ink cartridge; the printing head module is used for inkjet printing the laser light sources on the substrate; the ink cartridge is used for storing ink. By means of the technical solution, industrial manufacturing of the laser light sources is achieved, and speckles caused by laser coherence are eliminated.

A compound represented by the following formula (1) is an excellent near-infrared emitter. R.sup.1 to R.sup.6 are H or a substituent and R.sup.7 is represented by the following formula (2). Ar.sup.11 is an aryl group, R.sup.11 is a substituent other than an aryl group and n11 is 1 or more.

##STR00001##

A compound represented by the following formula (1) is an excellent near-infrared emitter. R.sup.1 to R.sup.6 are H or a substituent and R.sup.7 is represented by the following formula (2). Ar.sup.11 is an aryl group, R.sup.11 is a substituent other than an aryl group and n11 is 1 or more.

##STR00001##

An organic semiconductor laser device containing a compound represented by the following formula has a low threshold value for laser emission and has excellent laser characteristics. The ring A, the ring B and the ring C each are a aryl ring or a heteroaryl ring; Y.sup.1 is B, P, PO, PS, Al, Ga, As, SiR or GeR; R is an aryl group or an alkyl group; X.sup.1 and X.sup.2 each are O, NR, S or Se; R is an aryl group, a heteroaryl group or an alky group.

Disclosed is a current-injection organic semiconductor laser diode comprising a pair of electrodes, an optical resonator structure, and one or more organic layers including a light amplification layer composed of an organic semiconductor, which has a sufficient overlap between the distribution of exciton density and the electric field intensity distribution of the resonant optical mode during current injection to emit laser light.

Disclosed is a current-injection organic semiconductor laser diode comprising a pair of electrodes, an optical resonator structure, and one or more organic layers including a light amplification layer composed of an organic semiconductor, which has a sufficient overlap between the distribution of exciton density and the electric field intensity distribution of the resonant optical mode during current injection to emit laser light.

Disclosed are a current excitation type organic semiconductor laser containing a pair of electrodes, an organic laser active layer and an optical resonator structure between the pair of electrodes and a laser having an organic layer on a distributed feedback grating structure. The lasers include a continuous-wave laser, a quasi-continuous-wave laser and an electrically driven semiconductor laser diode.