An optofluidic laser with an ultrasmall Fabry-Perot (FB) micro-cavity, This optofluidic laser consists of two highly reflective cavity mirrors and a micro capillary. The two reflective minors are arranged in parallel to form a resonant cavity with an output mirror on the top and a total reflective mirror on the bottom of the cavity. The cavity length L is 30-50 m, the reflectance of the total reflective mirror is higher than 99.9% and the transmittance of the output mirror is 2%-10%. The capillary, serving as the pathway for the micro fluid, is placed between the two Bragg reflectors. The two ends of the capillary arc connected to Teflon soft tubes. The solution containing either gain medium or biological samples is transported to the FB micro-cavity through the soft tubes. The biological samples pass through the water-soluble or organic liquid gain medium in the micro fluid chamber with a certain speed and, under irradiation of a pumping light, produce high intensity, narrow-band output laser signals. The current invention replaces the traditional fluorescent signals with laser signals as the sensing and imaging medium, to achieve biological sensing with ultra-sensitivity and biological imaging with ultra-resolution.

An optofluidic laser with an ultrasmall Fabry-Perot (FB) micro-cavity, This optofluidic laser consists of two highly reflective cavity mirrors and a micro capillary. The two reflective minors are arranged in parallel to form a resonant cavity with an output mirror on the top and a total reflective mirror on the bottom of the cavity. The cavity length L is 30-50 m, the reflectance of the total reflective mirror is higher than 99.9% and the transmittance of the output mirror is 2%-10%. The capillary, serving as the pathway for the micro fluid, is placed between the two Bragg reflectors. The two ends of the capillary arc connected to Teflon soft tubes. The solution containing either gain medium or biological samples is transported to the FB micro-cavity through the soft tubes. The biological samples pass through the water-soluble or organic liquid gain medium in the micro fluid chamber with a certain speed and, under irradiation of a pumping light, produce high intensity, narrow-band output laser signals. The current invention replaces the traditional fluorescent signals with laser signals as the sensing and imaging medium, to achieve biological sensing with ultra-sensitivity and biological imaging with ultra-resolution.

In one exemplary embodiment, an apparatus can be provided which includes at least one biological medium that causes gain. According to another exemplary embodiment, an arrangement can be provided which is configured to be provided in an anatomical structure. This exemplary arrangement can include at least one emitter having a cross-sectional area of at most 10 microns within the anatomical structure, and which is configured to generate at least one laser radiation. In a further exemplary embodiment, an apparatus can be provided which can include at least one medium which is configured to cause gain; and at least one optical biological resonator which is configured to provide an optical feedback to the medium. In still another exemplary embodiment, a process can be whereas, a solution of an optical medium can be applied to a substrate. Further, it is possible to generate a wave guide having a shape that is defined by (i) at least one property of the solution of the optical medium, or (ii) drying properties thereof.

In one exemplary embodiment, an apparatus can be provided which includes at least one biological medium that causes gain. According to another exemplary embodiment, an arrangement can be provided which is configured to be provided in an anatomical structure. This exemplary arrangement can include at least one emitter having a cross-sectional area of at most 10 microns within the anatomical structure, and which is configured to generate at least one laser radiation. In a further exemplary embodiment, an apparatus can be provided which can include at least one medium which is configured to cause gain; and at least one optical biological resonator which is configured to provide an optical feedback to the medium. In still another exemplary embodiment, a process can be whereas, a solution of an optical medium can be applied to a substrate. Further, it is possible to generate a wave guide having a shape that is defined by (i) at least one property of the solution of the optical medium, or (ii) drying properties thereof.

A laser device includes a medium container, a gain medium contained in the medium container and optics configured to direct the laser to a sample. The optics preferably include no optical resonator around the gain medium. The gain medium is configured to receive energy to emit a laser and includes a first solvent and a compound dissolved therein. The compound conforms to formula (1): ##STR00001## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each independently hydrogen or an alkyl group. The laser media can function in both liquid as well as solid state and has shown a high optical gain of the order of 3.2 cm.sup.1 in pulsed and continuous wave modes.

A laser device includes a medium container, a gain medium contained in the medium container and optics configured to direct the laser to a sample. The optics preferably include no optical resonator around the gain medium. The gain medium is configured to receive energy to emit a laser and includes a first solvent and a compound dissolved therein. The compound conforms to formula (1): ##STR00001## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each independently hydrogen or an alkyl group. The laser media can function in both liquid as well as solid state and has shown a high optical gain of the order of 3.2 cm.sup.1 in pulsed and continuous wave modes.

A polystyrene-based chalcone including units of a 1-(2H-1,3-benzodioxol-5-yl)-3-[4-(dimethylamino)phenyl]-(2E)-propane-1-one and units of a 2-hydroxyethyl methacrylate. The units of the 1-(2H-1,3-benzodioxol-5-yl)-3-[4-(dimethylamino)phenyl]-(2E)-propane-1-one and the units of the 2-hydroxyethyl methacrylate are in a matrix of a polystyrene. A process for preparing the polystyrene-based chalcone and application as a laser medium with fine coating characteristics.

A polystyrene-based chalcone including units of a 1-(2H-1,3-benzodioxol-5-yl)-3-[4-(dimethylamino)phenyl]-(2E)-propane-1-one and units of a 2-hydroxyethyl methacrylate. The units of the 1-(2H-1,3-benzodioxol-5-yl)-3-[4-(dimethylamino)phenyl]-(2E)-propane-1-one and the units of the 2-hydroxyethyl methacrylate are in a matrix of a polystyrene. A process for preparing the polystyrene-based chalcone and application as a laser medium with fine coating characteristics.

Laser device characterized in that it comprises, as gain medium, a film of colloidal nanocrystals of semiconductor material, wherein said nanocrystals are two-dimensional nanocrystals suitable for forming quantum wells for confinement of the charge carriers in the nanocrystals and having a biexciton gain mechanism.

A laser device includes a medium container, a gain medium contained in the medium container and optics configured to direct the laser to a sample. The optics preferably include no optical resonator around the gain medium. The gain medium is configured to receive energy to emit a laser and includes a first solvent and a compound dissolved therein. The compound conforms to formula (1): ##STR00001##
where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each independently hydrogen or an alkyl group. The laser media can function in both liquid as well as solid state and has shown a high optical gain of the order of 3.2 cm.sup.1 in pulsed and continuous wave modes.