Optical single sideband transmitter
December 17, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPhase modulator-based generation of high-quality high bit rate return-to-zero optical data streams D/A converter Method and apparatus of driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line Optical modulation apparatus and method of controlling Optical transmitter and optical transmission system Apparatus and method for optical modulation Optical signal generating circuit and optical transmission line Patent #: 6718142 InventorsAssigneeApplicationNo. 10320527 filed on 12/17/2002US Classes:398/201, Including specific optical elements359/237, OPTICAL MODULATOR359/239, Modulator output feedback to modulator372/25, Control of pulse characteristics398/185, Hybrid modulation341/143, Differential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation)359/238, Light wave temporal modulation (e.g., frequency, amplitude, etc.)398/183Having particular modulationExaminersPrimary: Harvey, Minsun OhAssistant: Nguyen, Phillip Attorney, Agent or FirmInternational ClassesH01S 310G02F 100 G02B 2600 H04B 1012 AbstractWith the normal modulation method, it is difficult to construct a Hilbert transform device because it is complicated. To solve the problem, a single sideband modulated optical pulse train is generated by driving a Mach-Zehnder optical modulator for optical pulse generation with a laser source's sine wave clock signals that have been rendered 90 degrees out of phase from each other. The generated pulse train is applied to an optical modulator, modulated with an NRZ (nonreturn-to-zero) data signal, and filtered by a narrow-band optical filter to obtain one of two sidebands. | |
