| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | ALL-OPTICAL PHASE, WAVELENGTH, AND POLARIZATION-INSENSITIVE WAVELENGTH CONVERTERS | US11537638 | 2006-09-30 | US20070286551A1 | 2007-12-13 | Arie Shahar |
| An all-optical device for wavelength conversion, reshaping, modulating, and regenerating. The device includes a splitting device having first, second, third, and fourth terminals and a nonlinear element. The third and fourth terminals are associated with an optical loop including the nonlinear element when the nonlinear element is displaced from the mid-point of the optical loop. The splitting device is arranged to receive a modulated signal from one of the first and second terminals and a continuous beam from one of the first and second terminals to generate a patterned signal based on the continuous beam at one of the first and second terminals when the pattern of the patterned signal is inverted with respect to the pattern of the modulated signal. | ||||||
| 42 | Optical functional device based on Mach-Zehnder interferometer | US10825119 | 2004-04-16 | US07266266B2 | 2007-09-04 | Keisuke Matsumoto |
| An optical device for optical communication includes a first main electrode disposed between a first splitter and a second splitter on a first arm. A first auxiliary electrode is disposed between the second splitter and a third splitter on the first arm. A second main electrode and a second auxiliary electrode are disposed between a third splitter and a fourth splitter on a second arm. The second main electrode is provided on the second arm at the first port side, and the second auxiliary electrode is provided on the second arm at the second port side. By such disposition of the first and second auxiliary electrodes, input signal light applied through a third port or a fourth port acts on the first main electrode prior to the first and second auxiliary electrodes. Therefore, the input signal light will not be affected by the first and second auxiliary electrodes. | ||||||
| 43 | Three-Terminal Optical Signal Amplifying Device | US11632718 | 2005-03-04 | US20070201127A1 | 2007-08-30 | Yoshinobu Maeda |
| In the three-terminal optical signal amplifying device 10, a portion of the neighboring light LS at other wavelength than that of the first wavelength λ1 that is selected from the output light from the element 14 by the optical add drop filter 16, and the control light LC at the second wavelength λ2 input from the external are together input to the second semiconductor optical amplifying element 18. The output light including the output signal light LOUT at the second wavelength λ2 and the neighboring light at the neighboring wavelength to the second wavelength λ2 that is modulated and controlled by the control light LC in the cross gain modulation is output from the second semiconductor optical amplifying element 18. And the output signal light LOUT at the second wavelength λ2 passes through the wavelength selecting filter 20. | ||||||
| 44 | Traveling-wave optoelectronic wavelength converter | US11489067 | 2006-07-19 | US07174058B2 | 2007-02-06 | Christopher W. Coldren; Larry A. Coldren |
| Traveling-wave optoelectronic wavelength conversion is provided by a monolithic optoelectronic integrated circuit that includes an interconnected traveling-wave photodetector and traveling-wave optical modulator with a widely tunable laser source. Either parallel and series connections between the photodetector and modulator may be used. An input signal modulated onto a first optical wavelength develops a traveling wave voltage on transmission line electrodes of the traveling-wave photodetector, and this voltage is coupled via an interconnecting transmission line of the same characteristic impedance to transmission line electrodes of the traveling-wave optical modulator to modulate the signal onto a second optical wavelength derived from the tunable laser. The traveling wave voltage is terminated in a load resistor having the same characteristic impedance as the photodetector and modulator transmission lines. However, the interconnecting transmission lines and the load resistor may have different impedances than the photodetector and modulator. | ||||||
| 45 | Traveling-wave optoelectronic wavelength converter | US11359824 | 2006-02-22 | US20060140528A1 | 2006-06-29 | Christopher Coldren; Larry Coldren |
| Traveling-wave optoelectronic wavelength conversion is provided by a monolithic optoelectronic integrated circuit that includes an interconnected traveling-wave photodetector and traveling-wave optical modulator with a widely tunable laser source. Either parallel and series connections between the photodetector and modulator may be used. An input signal modulated onto a first optical wavelength develops a traveling wave voltage on transmission line electrodes of the traveling-wave photodetector, and this voltage is coupled via an interconnecting transmission line of the same characteristic impedance to transmission line electrodes of the traveling-wave optical modulator to modulate the signal onto a second optical wavelength derived from the tunable laser. The traveling wave voltage is terminated in a load resistor having the same characteristic impedance as the photodetector and modulator transmission lines. However, the interconnecting transmission lines and the load resistor may have different impedances than the photodetector and modulator. | ||||||
| 46 | METHOD AND APPARATUS FOR CONTROLLING A SOA-MZI WAVELENGTH CONVERTER | US11318511 | 2005-12-28 | US20060139738A1 | 2006-06-29 | Joo-youp Kim; Sang-kook Han |
| A method and apparatus for controlling an optical gain difference and an optical phase difference in a semiconductor optical amplifier-Mach-Zehnder interferometer (SOA-MZI) wavelength converter having two arms and that outputs probe output signals POH and POL, corresponding to pump input signals of logic high and logic low, respectively. The controlling includes detecting an optical power level of the output probe signals and controlling at least one of an optical gain difference between the two arms and an optical phase difference between the two arms in accordance with a detected optical power level of the probe output signal. | ||||||
| 47 | Wavelength converter and wavelength division multiplexing transmission method using the same | US10688197 | 2003-10-17 | US07061664B2 | 2006-06-13 | Osamu Aso; Shu Namiki; Kouki Sato; Hijiri Nimura |
| A wavelength converter using difference frequency generation (DFG) is disclosed. In one embodiment, the wavelength converter comprises (a) a first optical filter configured to filter out one or more lightwaves requiring wavelength conversion from wavelength-division multiplexed (WDM) lightwaves, and (b) a broadband multi-channel simultaneous wavelength conversion portion comprising a pump source that generates pump light for use in the process of the DFG, a first optical combiner for combining said pump light with said filtered lightwaves, a high non-linear medium configured to generate wavelength converted lightwaves from said filtered lightwaves using the DFG, and a second optical filter for filtering said wavelength converted from said filtered lightwaves. | ||||||
| 48 | WAVELENGTH CONVERTER FOR GENERATING WAVELENGTH TUNABLE LASER OPTICAL SOURCE IN ITSELF | US11296332 | 2005-12-08 | US20060119929A1 | 2006-06-08 | Young-kwang Seo; Hyun-chin Kim; Hyun-surk Ryu; June-koo Rhee; Keun-joo Park; Chun-ju Youn |
| A wavelength converter for generating a wavelength tunable laser optical source in itself is disclosed. The wavelength converter includes a first semiconductor optical amplifier for generating an optical noise, generating and outputting a first optical source by amplifying the generated optical noise if an external current is applied, first and second distributed Bragg reflectors for reflecting only a component of a specified wavelength range among components of the optical noise and applying the reflected component to the first semiconductor optical amplifier, and a second semiconductor optical amplifier for receiving an optical source divided from the optical source reflected by and outputted from the first distributed Bragg reflector and an input data optical source, generating and outputting a second optical source by changing a phase of the divided optical source according to a digital signal from the input data optical source. The first and second optical sources outputted from the first and second semiconductor optical amplifiers are added together, and a signal of which the wavelength is converted through either a constructive interference or a destructive interference of the added first and second optical sources is outputted. | ||||||
| 49 | Multi-frequency light source | US10112096 | 2002-03-27 | US07054057B2 | 2006-05-30 | Osamu Aso; Shunichi Matushita; Misao Sakano; Masateru Tadakuma |
| A multi-frequency light producing method and apparatus multiplies the number of optical channels present in an incident wavelength division multiplexed (WDM) signal light source by four-wave mixing (FWM) the WDM signal with at least one pump lightwave at least one time. By FWM the WDM light and a pump lightwave multiple times, wherein each FWM process is executed with a pump lightwave having a different frequency, either in series or parallel, the number of optical channels produced as a result of FWM effectively increases the number of optical channels present in addition to those from the WDM signal. The light producing method and apparatus can be employed in a telecommunications system as an inexpensive light source producing a plurality of optical frequencies. | ||||||
| 50 | Traveling-wave optoelectronic wavelength converter | US10724942 | 2003-12-01 | US07043097B2 | 2006-05-09 | Christopher W. Coldren; Larry A. Coldren |
| Traveling-wave optoelectronic wavelength conversion is provided by a monolithic optoelectronic integrated circuit that includes an interconnected traveling-wave photodetector and traveling-wave optical modulator with a widely tunable laser source. Either parallel and series connections between the photodetector and modulator may be used. An input signal modulated onto a first optical wavelength develops a traveling wave voltage on transmission line electrodes of the traveling-wave photodetector, and this voltage is coupled via an interconnecting transmission line of the same characteristic impedance to transmission line electrodes of the traveling-wave optical modulator to modulate the signal onto a second optical wavelength derived from the tunable laser. The traveling wave voltage is terminated in a load resistor having the same characteristic impedance as the photodetector and modulator transmission lines. However, the interconnecting transmission lines and the load resistor may have different impedances than the photodetector and modulator. | ||||||
| 51 | Four-wave-mixing based optical wavelength converter device | US10518855 | 2002-06-28 | US20060092500A1 | 2006-05-04 | Andrea Melloni; Francesco Morichetti; Silvia Pietralunga; Mario Martinelli |
| Wavelength converter device for generating a converted radiation at frequency Ωg through interaction between at least one signal radiation at frequency Ωg and at least one pump radiation at frequency Ωg, with an input for the at least one signal radiation at frequency Ωg; a pump light source for generating the at least one pump radiation at frequency Ωg, an output for taking out the converted radiation at frequency Ωg, a structure for transmitting the signal radiation, the structure including one optical resonator having a non-linear material, having an optical length of at least 40*η/2, wavelength η being the wavelength of the pump radiation, and resonating at the pump, signal and converted frequencies Ωp, Ωs, and Ωg. The structure has a further optical resonator coupled in series to the optical resonator, the further optical resonator having a non-linear material, having an optical length of at least 40*η/2, wherein η is the wavelength of the pump radiation, and resonating at the pump, signal and converted Ωp, Ωs and Ωg, wherein by propagating through the structure, the pump and signal radiation generate the converted radiation by non-linear interaction within the optical resonators. | ||||||
| 52 | Method of wavelength conversion and wavelength converter | US11042334 | 2005-01-26 | US20050207757A1 | 2005-09-22 | Toshiaki Okuno |
| The wavelength converter comprises (1) an optical multiplexer for multiplexing an amplitude-modulated first light and reference light, which is continuous light having a wavelength different from the wavelength of the first light, (2) an optical fiber for propagating the multiplexed light therethrough to generate a third light by a non-linear optical phenomenon, and (3) an optical filter having a pass wavelength range set such that a pulse time width of the third light is 20% or more narrower than a pulse time width of the first light after the third light has passed through the optical filter, or (3′) an optical filter having a pass wavelength range set such that a cross point of an eye pattern of the third light is lower than a cross point of an eye pattern of the first light after the third light has passed through the optical filter. | ||||||
| 53 | Wavelength converting apparatus using optical source having fixed wavelength and an optical cross connect system adapting thereof | US10201811 | 2002-07-24 | US06888664B2 | 2005-05-03 | Jaemyoung Lee; Byoung-whi Kim |
| The present invention provides a wavelength converting apparatus and optical cross connect system using the same. The wavelength converting apparatus includes a plurality of optical sources of fixed wavelengths, a switching means, and at least one wavelength converting means. The optical sources with fixed wavelengths provide probe beams with fixed wavelengths, the wavelength being different from each other. The switching means selects at least one beam of a wavelength corresponding to a wavelength conversion request of a transmission signal among a plurality of beams inputted from the fixed-wavelength light sources, and provides the selected beam as a probe beam. The wavelength converting means receives the transmission signal and the probe beam from the switching means, and converts a wavelength of the inputted transmission signal through cross gain modulation, cross phase modulation or optical-to-electrical-to-optical (O/E/O) conversion of the transmission signals and the probe beams. | ||||||
| 54 | Filter-free wavelength converter | US10334937 | 2002-12-31 | US06856452B2 | 2005-02-15 | Jong Hoi Kim; Kwang Ryong Oh; Yong Soon Baek; Hyun Soo Kim; Kang Ho Kim |
| Filter-free wavelength converters for separating and rejecting an optical input signal. A first input port couples a continuous wave (CW) light. A second input port couples an optical input signal. A multimode interference semiconductor optical amplifier (MMI-SOA) determines the output port with the input port and intensity-modulation of the CW light with the optical input signal. A first output port guides the converted signal, and a second output port guides the optical input signal. | ||||||
| 55 | Optical transistor and method thereof | US10072263 | 2002-02-07 | US06847054B1 | 2005-01-25 | Sol P. DiJaili; Jeffrey D. Walker |
| An optical transistor is disclosed that provides a fast switching time, an amplified gain, and isolation. The optical transistor receives a small optical input signal at an optical base port, generates an amplified replica at an optical emitter port, and generates an inverted replica on a vertical light at an collector port. One embodiment of the optical transistor is implemented with a vertical lasing semiconductor optical amplifiers (VLSOA), wherein the ballast light is used a signal for the collector port. | ||||||
| 56 | Method and apparatus for wavelength conversion | US10053231 | 2002-01-17 | US06831775B2 | 2004-12-14 | Shunichi Matsushita; Osamu Aso; Misao Sakano |
| A wavelength converting method and apparatus which converts wavelength division multiplexed (WDM) signal light, having a plurality of channels, by four-wave mixing the WDM signal light with at least one pump lightwave. Wavelength conversion of the WDM signal is accomplished without producing noise by FWM the WDM signal with a pump lightwave, wherein the pump lightwave frequency is separated from the WDM signal by an interval equal to or greater than the bandwidth of the WDM signal. Two pump lightwaves can be used instead of one, wherein one of the pump lightwaves has a frequency on one side of the bandwidth of the WDM signal, and the average frequency of the two pump lightwaves is on the other side of the WDM signal bandwidth. | ||||||
| 57 | Wavelength converter and wavelength division multiplexing transmission method using same | US10688197 | 2003-10-17 | US20040184807A1 | 2004-09-23 | Osamu Aso; Shu Namiki; Kouki Sato; Hijiri Nimura |
| A wavelength converter configured to filter out solely lightwaves required to be wavelength converted from the input broadband of wavelength division multiplexed (WDM) lightwaves, which are wavelength converted by use of four-wave mixing (FWM). Frequency interval of the input WDM lightwaves is broadened or reduced in comparison of the frequency interval of the WDM lightwaves inputted to the wavelength converted. The frequency interval variation techniques using the wavelength converter, it can be realized to transfer from transmission lines less influenced by inter-channel crosstalk due to FWM to the different transmission lines strongly influenced by inter-channel crosstalk due to FWM, and vice versa. In one embodiment, the invention employs difference frequency generation (DFG) instead of FWM. | ||||||
| 58 | Cross-gain modulation type optical wavelength converter having high extinction ratio and wide input dynamic range | US10360453 | 2003-02-06 | US06795233B2 | 2004-09-21 | Joon Hak Bang; Je Soo Ko |
| The present invention provides a cross-gain modulation type optical wavelength converter having a high extinction ratio and a wide input dynamic range, which is capable of preventing an extinction ratio from lowering and allowing an input dynamic range to widen. The XGM type optical wavelength converter of the present invention allows a probe light to be cross-gain modulated by a pump light one more time using two SOAs, and allows the width of the modulation of the probe light to be further broadened, thereby improving the extinction ratio after wavelength conversion. Simultaneously, the XGM type optical wavelength converter detects the intensity of an optical signal inputted to the optical wavelength converter and automatically controls the intensity of the probe light on the basis of the detected intensity of the input optical signal, thereby providing a wide input dynamic range. | ||||||
| 59 | Light-controlled light modulator | US09953796 | 2001-09-17 | US06753996B2 | 2004-06-22 | Yasuo Shibata; Yasuhiro Suzuki; Yoshihisa Sakai; Yasumasa Suzaki; Akira Okada; Kazuto Noguchi; Rieko Sato |
| A light-controlled light modulator can achieve high-speed, low-loss wavelength conversion. Continuous light with a wavelength &lgr;j is launched into an MMI coupler via a port, and is split into two parts by the MMI coupler, which are led to a loop-type interferometer. In the loop-type interferometer, the two parts travel separately around the loop as clockwise traveling light and counterclockwise traveling light, are combined by the MMI coupler again via a filter-equipped phase modulator, thereby being emitted to the port. In this state, signal light &lgr;i(s) with a wavelength &lgr;i is launched into the filter-equipped phase modulator via a port. Even when the wavelength &lgr;i of the signal light &lgr;i(s) is equal to the wavelength &lgr;j of the wavelength converted output light, the wavelength conversion can be achieved with preventing noise from being mixed into the output light emitted from a port. | ||||||
| 60 | Wavelength converter | US10651253 | 2003-08-29 | US20040105615A1 | 2004-06-03 | Toshiaki Okuno |
| Provided is a wavelength converter that makes it possible to improve the S/N ratio of output signal light. In the wavelength converter, optical pump light null3 output from an optical pump source passes through a first reflector and travels through an optical fiber. Light having wavelengths that differ from the aforementioned wavelength is generated by a nonlinear optical phenomenon at the optical fiber. Of the light, generated light null4 having a resonant wavelength of a resonator is optically amplified and oscillated. An input signal null1 also passes through the first reflector and travels through the optical fiber. At the optical fiber, an output signal light null2 having a different wavelength is generated by a nonlinear optical phenomenon between the generated light null4 and the input signal light null1. The output signal light null2 passes through a second reflector and is output from a resonator. | ||||||
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