Industrial Technology Research Institute

Yao-Wun Jhang

Hsin-Chia Su

Chien-Ming Huang

Shih-Ting Lin

Chieh Hu

Chih-Lin Wang

Li-Ting Wang

Hong-Xi Cao

Chih-Li Chen

Hong-Xi Tsau

An apparatus for generating a pulse train with an adjustable time interval is provided. The apparatus, being an annular optical cavity structure, includes a seed source receiving end, a pump source receiving end, an optical coupler, an optical combiner, a gain fiber, an optical path time regulator and a beam splitter. Thus, the apparatus is capable of generating a pulse train with an adjustable time interval to increase material processing quality and speed.

Apparatus for generating pulse train with adjustable time interval

An apparatus for generating a short-pulse laser using a temporally modulated sideband gain is provided. The apparatus includes a laser diode and an external reflector. By use of a time difference resulted by a nanosecond laser pulse signal at the external reflector, a sideband gain is obtained for generating a short-pulse picosecond laser output.

Apparatus for generating short-pulse laser using temporally modulated sideband gain

A UV light generator for receiving a baseband light beam from a baseband light source is provided. The UV light generator includes a first lens unit, a second lens unit, a first frequency doubling crystal and a second frequency doubling crystal. The baseband light beam from the baseband light source passes through the first lens unit. The first lens unit and the second lens unit control a minimum of baseband light spot position and a minimum of second harmonic light spot position. The first frequency doubling crystal is disposed between the first lens unit and the second lens unit, and located on the minimum of baseband light spot position. The second frequency doubling crystal is disposed between the first lens unit and the second lens unit, and located on the minimum of second harmonic light spot position.

UV light generator

An optical fiber with filtering thin film includes a first ferrule having a first through hole and a first contact surface. A first fiber is disposed into the first through hole, extending to the first contact surface. A first interface coupling material is between the first ferrule and the first fiber. A second ferrule has a second through hole and a second contact surface. A second fiber is disposed into the second through hole, extending to the second contact surface. A second interface coupling material is between the second ferrule and the second fiber. The first contact surface and the second contact surface are parallel and have an included tilt angle from a perpendicular transverse plane of first fiber. An optical filtering film is disposed between the first contact surface and the second contact surface. The first fiber and the second fiber are aligned.

Optical fiber structure with filtering thin film

A laser apparatus with all optical-fiber includes a plurality of pumping light sources in different wave bands and an optical-fiber laser system. The optical-fiber laser system includes an optical fiber at least doped with erbium (Er) element and doped with or not doped with ytterbium (Yb) element according to a need. The optical-fiber laser system outputs a laser light through the pumping light source.

Laser apparatus with all optical-fiber

An all-fiber color laser and a light-illuminating method thereof are disclosed. The steps of the light-illuminating method include: providing a fiber color laser having a pump light source and an optical fiber with a multi-level wavelength gain medium, a first grating assembly and a second grating assembly; radiating a laser via the pump light source; generating a plurality of laser beams with various wavelengths via the multi-level wavelength gain medium; adjusting the deformation of the second grating assembly to control output of the laser beams with various wavelengths; and executing periodical modulation to generate a periodical lengthwise deformation of the second grating assembly for mixing color.

All-fiber color laser and light-illuminating method thereof

A fiber laser device includes a laser pump for irradiating a laser beam, an optical component, an optical fiber and an optical sensor. The optical component has a first and a second output end, wherein a portion of the laser beam is output from the first output end and another portion of the laser beam is output from the second output end. The optical fiber including a core and a cladding layer is optically coupled between the laser pump and the optical component. A inclined angle &#x3b8; of the first output end satisfies the following relations that &#x3b8;/2&#x2266;&#x3b8;&#x2266;&#x3b8;, and &#x3b8;=sin(NA&#xb7;n/n), where NA is numerical aperture of optical fiber, nis refractive index of the core, and nis refractive index of the cladding layer. The optical sensor is disposed at a light-transmission path of the laser beam reflected by the first output end.

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Chiayi, Taiwan

Yao-Wun Jhang