Class / Patent application number | Description | Number of patent applications / Date published |
359484000 | Time invariant electric, magnetic, or electromagnetic field responsive (e.g., electro-optical, magneto-optical) | 8 |
20090015919 | Nanosized Euse Crystal and Manufacturing Method Thereof - The present invention has been developed for providing a method to easily manufacture a nanosized EuSe crystal which has been conventionally difficult to be manufactured. Heating the Eu(III) complex whose general formula is represented by the following formula generates an EuSe crystal having a particle size corresponding to the heating condition. Alternatively, the mixture composed of Eu(III) complex, a counter cation, and a solvent may be heated. Since the particle size of the nanosized EuSe crystals can be manipulated by the heating condition, the absorption wavelength of the EuSe crystals can be easily controlled. In addition, since it is easy to create a magnetooptic-responsive plastic using the high dispersibility of the EuSe crystals, it can be immediately applied to an optical isolator or other devices. | 01-15-2009 |
20090080072 | POLARIZATION MODE DISPERSION COMPENSATION USING AN ARRAYED WAVEGUIDE GRATING - One embodiment of the present invention sets forth a system for compensating for the detrimental effects of all-order polarization mode dispersion. The system includes a broadband polarization correction module cascaded with a broadband phase correction module. Each of the modules includes an AWG chip as a wavelength dispersing element, as opposed to a bulk optic grating. Thus, aligning the optical components used to separate light beams of different wavelengths within the system is simpler, and the size of the overall system is reduced. Further, the AWG chip may be more easily aligned with the other optical components within the system, with the alignment being more robust, both mechanically and thermally, relative to prior art systems that include bulk optics. Since AWG chips may be fabricated using well-known fabrication techniques, overall manufacturability is also improved and costs are reduced. | 03-26-2009 |
20090231701 | Free Space Isolator Optical Element Fixture - Optical isolators are used in optical communication systems, especially optical systems which employ semiconductor lasers. As transmission rates used in optical communications systems have increased, for example to several Gbits per second, the performance required of lasers used in such systems has also increased. It is well known that light reflected back from some parts of an optical communications system will adversely affect the operation of such a high performance laser leading to fluctuations in the spectrum, line width, or intrinsic noise of the laser. In this invention, a free space isolator is illustrated utilized to protect such high performance semiconductor lasers from these reflections by stabilizing an optical element within a base. | 09-17-2009 |
20090268289 | Optical element and optical isolator using the same - The present invention is an optical element at least with a Faraday rotator of which both light-transmission surfaces are bonded through a bonding layer to light-transmission surfaces of polarization glasses which are orientationally dispersed with anisotropically-shaped particles at their surfaces, wherein each of the polarization glasses includes the orientationally dispersed anisotropically-shaped particles only at one surface opposite to the bonding surface, and a relation t≧30 μm is satisfied, wherein “t” denotes a distance between one of the bonding surfaces of the Faraday rotator and that surface of the polarization glass on the one of the bonding surfaces of the Faraday rotator which is disposed with the particles. As a result, there can be provide the optical element of which high isolation ( | 10-29-2009 |
20090290213 | Faraday rotator, opto-isolator, and laser processing apparatus - A Faraday rotator, an opto-isolator, and a laser processing apparatus are provided in which change in polarization rotation angle caused by a temperature increase in the Faraday rotator can be prevented, even when an increase in laser beam output or change in ambient temperature occurs. | 11-26-2009 |
20100007952 | Arrangement for Adjusting and Compensating for First- and Second-Order Polarization Mode Dispersion - A configuration contains a series connection of a first emulation element, having a first adjustable differential delay time between the fast and slow main axes and further having an adjustable chromatic dispersion of a polarization adjuster for the adjustment of a polarization rotation angle, and of a second emulation element, having a second adjustable delay time. Advantageously, the first and second differential delay times, the polarization rotation angle, and the chromatic dispersion can be adjusted by the configuration such that a desired value each is obtained for the differential group delay, the depolarization, and the polarization-dependant chromatic dispersion. By the adjustment of the chromatic dispersion, arbitrary frequency-dependant run times of the spectral components of a broadband optical input signal are generated. The configuration may also be utilized for the compensation of PMD of the first and second orders. | 01-14-2010 |
20100142046 | Optical Isolator, Shutter, Variable Optical Attenuator and Modulator Device - An integrated optical device functioning as optical isolator, shutter, variable optical attenuator, and modulator is disclosed. The device employs a Pockels cell for dynamically rotating with nanosecond speed the polarization state of incident light for attenuation and modulation. The invention provides a compact, high performance and reliable device without moving parts for use in laser systems and particularly in fiber optic telecommunication system. | 06-10-2010 |
20110069387 | IN-LINE OPTICAL ISOLATOR - In an in-line optical isolator, a first polarization separation element | 03-24-2011 |