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| Number | Title | Issue Date |
| 7633992 | Laser module including jointly arranged isolator and fiber sleeve A laser module including a first housing which encloses a semiconductor laser device, a support, a fiber sleeve for holding an optical fiber, a lens, and an isolator. The isolator and the fiber sleeve are jointly arranged within a second housing which is an integral... | 12/15/2009 |
| 7253956 | Optical isolator element, a method for producing such an element, and an optical isolator using such an element An optical isolator is constructed such that an optical isolator element in which at least one flat Faraday rotator and at least two flat polarizers are bonded to each other into an integral unit by van der Waals forces or hydrogen-bonding forces acting between bond... | 08/07/2007 |
| 7230760 | Polarizers and isolators and methods of manufacture A passively aligned optical isolator includes laminated layers of material including two polarizing glass layers sandwiching a Faraday rotator layer. Each polarizing glass layer comprises a glass matrix containing elongated metal particles exhibiting a change in pol... | 06/12/2007 |
| 7173762 | Optical isolator with reduced insertion loss and minimized polarization mode dispersion An isolator is disclosed that features a single birefringent correction element. The correction element is configured to eliminate differential group delay and walk-off simultaneously. ... | 02/06/2007 |
| 7056036 | High speed TO-can based optical module An optical module having a TO-can structure is disclosed, wherein frequency characteristics have been improved in order to make high-speed transmission possible. The optical module comprising a silicon optical bench wherein a V-groove is formed, a laser diode dispos... | 06/06/2006 |
| 7050232 | Optical circulator and optical switch A first separating/combining birefringent element 10, first and second optical-path controlling birefringent elements 11, 12, and a second separating/combining birefringent element 13 are spaced apart. Between the first separating/combining bire... | 05/23/2006 |
| 7045823 | Optical semiconductor device having semiconductor laser and electroabsorptive modulator An optical semiconductor device comprises a semiconductor laser (11) including a lower clad layer, an active layer (4), and an upper layer formed in this order, an electroabsorptive modulator (12) including the lower clad, a light absorption lay... | 05/16/2006 |
| 7023618 | Dual-stage optical isolator minimized polarization mode dispersion and simplified fabrication process An optical isolator includes a first stage configured to refract a light ray applied in a forward direction into a first ray and a second ray. A second stage rotated 90° with respect to the first is configured to refract said first and second rays in a substantiall... | 04/04/2006 |
| 6978063 | Compact optical fiber amplifier module An optical fiber amplifier module is disclosed which comprises a signal path located between a signal input and a signal output. A WDM coupler and an amplifying gain medium are disposed along the signal path. A pump laser is disposed out of the signal path in a mann... | 12/20/2005 |
| 6950235 | Optical isolators and methods of manufacture Optical isolators and methods of manufacturing optical isolators are disclosed. The optical isolators are manufactured by directly bonding the parts of the isolators without the use of adhesive or mechanical devices to hold the individual parts together. ... | 09/27/2005 |
| 6845121 | Optical isolator apparatus and methods Methods and apparatus for optimizing feedback suppression of optical isolators when used with variable wavelength light sources. The methods comprise positioning an optical isolator in a light beam, and adjusting feedback suppression by the optical isolator accordin... | 01/18/2005 |
| 6839170 | Optical isolator An optical system provides reflection-type isolation, and may include variable optical attenuation and/or a tap monitor. The optical system may include an optical isolator with a beam splitter such as a walk-off plate, a focusing element such as a GRIN lens, a combi... | 01/04/2005 |
| 6836588 | Optical signal interleaving comb filter with reduced chromatic dispersion and applications therefor Optical signal interleaver/deinterleavers with reduced chromatic dispersion are described. In one embodiment, the interleaver/deinterleavers include two optical filters and an optical isolator coupled to receive the output of each of the optical filters. The optical... | 12/28/2004 |
| 6829410 | Optical signal interleaving comb filter with reduced chromatic dispersion and applications therefor Optical signal interleaver/deinterleavers with reduced chromatic dispersion are described. In one embodiment, the interleaver/deinterleavers include two optical filters and an optical isolator coupled to receive the output of each of the optical filters. The optical... | 12/07/2004 |
| 6822997 | Semiconductor laser module and optical transmission system The invention provides a semiconductor laser module and an optical transmission system, with which noise caused by light reflected back from a transmission path can be suppressed. The semiconductor laser module, includes a package having a window, a semiconductor la... | 11/23/2004 |
| 6791748 | Optical isolators and methods of manufacture Optical isolators and methods of manufacturing optical isolators are disclosed. The optical isolators are manufactured by directly bonding the parts of the isolators without the use of adhesive or mechanical devices to hold the individual parts together. ... | 09/14/2004 |
| 6785431 | Miniature circulator array devices and methods for making the same Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device according to the present invention includes a spatial walkoff plate (SWP) coupled on opposite ends to first and second polariza... | 08/31/2004 |
| 6762879 | Method and system for providing an optical circulator In another aspect, the invention provides a closed loop optical circulator including a first crystal for splitting an input light signal into two components, a second crystal for deflecting the two components received from the first crystal in a direction if the two... | 07/13/2004 |
| 6757101 | None-mechanical dual stage optical switches The present invention provides improved optical switches in which no mechanical movement is required to direct optical pathways between plural fiber ports. Advantageously, the inventive switches incorporate two-stage polarization rotation to improve isolation depth,... | 06/29/2004 |
| 6717706 | State of polarization detector State of polarization detectors and polarization control systems are disclosed. For example, the invention features an integrated optical assembly including: (i) a series of polarization-sensitive interfaces defining an optical beam path for an input optical beam to... | 04/06/2004 |
| 6646777 | Optical isolator with improved mounting characteristics An optical isolator includes a first magnetic polar source having a first magnet axis, a second magnetic polar source having a second magnet axis parallel to the first magnet axis, and an optical element between the first and second magnetic polar sources... | 11/11/2003 |
| 6636661 | Optical signal interleaving comb filter with reduced chromatic dispersion and applications therefor Optical signal interleaver/deinterleavers with reduced chromatic dispersion are described. In one embodiment, the interleaver/deinterleavers include two optical filters and an optical isolator coupled to receive the output of each of the optical filters. ... | 10/21/2003 |
| 6621630 | Composite optical element, optical isolator, optical attenuator and processes for producing them An optical element comprises a Faraday rotator and first, second, third, and fourth birefringent regions. The first and second regions and a fifth region are joined to one plane of the rotator. The third and fourth regions and a sixth region are joined to... | 09/16/2003 |
| 6600601 | Polarization-independent optical isolator and production method thereof A polarization-independent optical isolator includes a first birefringent wedge plate having an inclined plane directed to a light incoming side; a second birefringent wedge plate having an inclined plane directed to a light outgoing side, the wedge equal... | 07/29/2003 |
| 6587266 | Bi-directional isolator Bi-directional wavelength interleaving optical isolators provide the ability to pass a first set of optical signals (e.g., ITU even channels) from a first port to a second port, while preventing a second set of optical signals from passing thereto. The bi... | 07/01/2003 |
| 6580558 | Optical isolator An optical isolator includes a first pigtail assembly, a first collimating lens aligned with the first pigtail assembly, an optical rotator assembly, an adjustable assembly aligned with the rotator assembly, and a second pigtail assembly having a ferrule ... | 06/17/2003 |
| 6580842 | Integrated optical circulator array A circulator array is constructed in a planar substrate by forming a plurality of waveguide pair structures, each waveguide pair structure having first and second sections respectively coupled by first and second polarization multiplexers. A nonreciprocal... | 06/17/2003 |
| 6574393 | Compact optical fiber amplifier module An optical fiber amplifier module is disclosed which comprises a signal path locatee between a signal input and a signal output. A WDM coupler and an amplifying gain medium are disposed along the signal path. A pump laser is disposed out of the signal pat... | 06/03/2003 |
| 6570711 | Virtual waveplate and optical channel interleaver formed therewith A conventional interleaver, based on a stack of waveplates, relies on the orientation and the birefringence of the waveplates to differentiate the polarizations of one set of channels from another, so that the one set of channels can be separated from the... | 05/27/2003 |
| 6563639 | Polarizing glasses Polarized glass articles and method of manufacturing polarizing glass articles are disclosed. Optical isolators using the polarizing glass articles have reduced coupling and surface losses when compared with conventional optical isolators.... | 05/13/2003 |
| 6560387 | Doped fiber amplifier utilizing integrated circulator array A reflective doped fiber amplifier array utilizes an integrated circulator array to effect routing of optical signals. The integrated circulator array has a plurality of waveguide pairs coupled by polarization multiplexers formed in a planar substrate, an... | 05/06/2003 |
| 6552836 | High performance polarization controller and polarization sensor The invention is an instrument for sensing the state of polarization (SOP), and for transforming the SOP of a beam of light from an incident continuously-varying arbitrary SOP to a desired exit SOP, using a polarization compensator under feedback control.... | 04/22/2003 |
| 6535656 | Planar-type polarization independent optical isolator A planar-type optical isolator includes a substrate, a first mode splitter, a second mode splitter and a phase shift region formed on the substrate between the first mode splitter and the second mode splitter. The first mode splitter is formed on the subs... | 03/18/2003 |
| 6532321 | Fiber optic isolator for use with multiple-wavelength optical signals A fiber optic isolator device is used by fiber optic systems operating at more than one wavelength. The device may be inserted anywhere within the fiber network. The fiber optic device permits the separation of the wavelengths so that an optical isolator ... | 03/11/2003 |
| 6480331 | Reflection-type polarization-independent optical isolator, optical isolator/amplifier/monitor, and optical system A variety of polarization independent optical isolators, including a single stage polarization independent optical isolator, a single stage broadband polarization independent optical isolator, a double stage polarization independent optical isolator, a do... | 11/12/2002 |
| 6462872 | Optical isolator There is disclosed an optical isolator, wherein one surface of an optical element comprising at least one polarizer and at least one Faraday rotator is bonded and fixed to a substrate in which a height of an optical element bonded portion surface has a le... | 10/08/2002 |
| 6449091 | Optical isolator Tuning to maximize the isolation provided by an optical isolator to one of a predetermined plurality of wavelengths is achieved by tilting the isolator with respect to an input beam of light. Further tuning to a peak response for a given wavelength is ach... | 09/10/2002 |
| 6421176 | Optical isolator An optical isolator having a constitution in which a Faraday rotator is sandwiched by two polarizers, which can be more easily produced at a reduced cost. An optical isolator is constituted so that it comprises the following constituent elements in the de... | 07/16/2002 |
| 6411641 | Faraday rotator for use with high energy lasers A high-energy laser Faraday rotator is used in an optical system in which the Faraday rotator absorbs laser light energy of more than 20 mW. The Faraday rotator includes a bismuth-substituted rare-earth iron garnet single crystal film grown as a Faraday r... | 06/25/2002 |
| 6360034 | Reflection based nonmoving part optical switch Multiple N×M and M×N optical switchers that may be combined within a single package to produce an N×N optical switch, where M is greater than N. The use of multiple optical switchers within an optical switch package allows for a higher degree of isolat... | 03/19/2002 |
