Wavelength shift testing apparatus, wavelength locking system and method thereof

A wavelength drift and detection device technology, applied in the field of optical communication, can solve problems such as high requirements for filtering and extraction of scrambled signals, reduced reliability of wavelength locking, and complex low-frequency scrambling devices, so as to improve accuracy, simplify complexity, and eliminate interference effect

Inactive Publication Date: 2008-08-20
HUAWEI TECH CO LTD
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Problems solved by technology

[0011] for image 3 The method shown requires different low-frequency modulations for different wavelengths at the same time, which makes the low-frequency scrambling device more complicated and needs to be realized by fractional frequency division and other technologies, and the interval between different disturbance frequencies is relatively small, and there is interference between them. The requirements for filtering and extracting the scrambled signal are relatively high, which increases the complexity of the entire device and reduces the reliability of wavelength locking

Method used

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  • Wavelength shift testing apparatus, wavelength locking system and method thereof
  • Wavelength shift testing apparatus, wavelength locking system and method thereof
  • Wavelength shift testing apparatus, wavelength locking system and method thereof

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0038] Figure 4 It is a schematic structural diagram according to an embodiment of the present invention. In this implementation, each optical module includes a feedback controller, a laser transmitter, and a low-frequency modulation module, such as Figure 4 In the optical module 160a to the optical module 160n. The optical signals output by each optical module are combined into a single optical signal output by a multiplexing unit such as a multiplexer 150, and a small part of the optical signal is split by the optical splitter 140 and introduced into the wavelength locking device 130, which is used for wavelength locking 130 includes a wavelength shift detection device and a processing control module 132.

[0039] The wavelength shift detection device includes a wavelength locking module 131 and a signal processing module 135. The following takes...

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Abstract

The present invention discloses a wavelength setting drift detecting device, wavelength locking system and method thereof, multiple optical modules shares one set device for lock down wavelength, and wavelength do not need select module, because only one outputting signal of optical module is scrambled, and different optical module outputs with identification information light signal, all identification information are sameness. If scrambling of each light signal adopts identical frequency, complexity of scrambling device is simplified, and interference between scrambling signals can be eliminated, because switch of electromechanical device control wavelength is not used, cost is reduced, locking velocity is improved, and precision of signal processing is improved, thereby locking accuracy of wavelength is improved.

Description

Technical field [0001] The present invention relates to the field of optical communication technology, and in particular, to a wavelength drift detection device, a wavelength locking system and a method in a dense wavelength division multiplexing (DWDM, DenseWavelength Division Multiplexing) system. Background technique [0002] With the rapid growth of broadband services, there is a higher demand for transmission bandwidth. DWDM is a technology used to increase bandwidth on existing fiber optic networks. This technology uses dense wavelength division multiplexing to transmit multiple signals of different wavelengths in one optical fiber, thereby improving the transmission capacity of a single optical fiber. When the number of optical fibers is limited, the wavelength division multiplexing system is one of the effective methods to increase transmission capacity. [0003] In a DWDM system, as the number of transmission channels increases, the spacing between channels contin...

Claims

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Application Information

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IPC IPC(8): H04J14/02H04B10/08H04B10/572
CPCH01S5/0687H04B10/572
Inventor 涂敏海
Owner HUAWEI TECH CO LTD
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