Optical wavelength interlacing filter with bandwidth allocation characteristics adjustable
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A technology of bandwidth allocation and optical wavelength, applied in the directions of light guide, optics, instruments, etc., can solve the problems such as limiting application, increasing the complexity of system structure, communication fiber connection loss, and inability to adjust the bandwidth allocation of parity channels. Simple, low-cost effects
Inactive Publication Date: 2015-01-28
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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However, the response function of the single-stage Mach-Zehnder interferometer optical interleaved filter is approximately sinusoidal, and its transmission efficiency is very sensitive to the shift of the signal wavelength; Symmetric optical interleave filters with equal channel bandwidth limit their application in dynamic DWDM systems
Although in recent years, an asymmetric optical interleaved filter has been proposed [W
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Embodiment 1
[0021] Embodiment one , a double-pumped optical interleaved filter with adjustable bandwidth distribution characteristics, such as figure 1 , including, input wavelength division multiplexing signal 10, 1×2 optical coupler 20, first 2×2 optical coupler 1, second 2×2 optical coupler 2, third 2×2 optical coupler 3, the first A pump light source 91 , a second pump light source 92 , a first doped fiber 11 , a second doped fiber 12 , an optical phase modulator 6 , an odd output channel 7 , and an even output channel 8 .
[0022] The connection of each device is as follows:
[0023] The first port of the 1 × 2 optical coupler 20 is connected to the input wavelength division multiplexing signal 10, the second port of the 1 × 2 optical coupler 20 is connected to the first port of the first 2 × 2 optical coupler 1, and the 1 × 2. The third port of the optical coupler 20 is connected to the optical input port of the optical phase modulator 6.
[0024] The second port of the first 2×...
Embodiment 2
[0029] Embodiment two , a single-pump optical interleaved filter with adjustable bandwidth distribution characteristics, such as figure 2 , including, input wavelength division multiplexing signal 10, first 1×2 optical coupler 20, second 1×2 optical coupler 30, first 2×2 optical coupler 1, second 2×2 optical coupler 2 , Pump light source 9, first doped fiber 11, second doped fiber 12, optical phase modulator 6, odd output channel 7, even output channel 8.
[0030] The connection of each device is as follows:
[0031] The first port of the first 1 × 2 optical coupler 20 is connected to the input wavelength division multiplexing signal 10, the second port of the first 1 × 2 optical coupler 20 is connected to the first port of the first 2 × 2 optical coupler 1 The third port of the first 1×2 optical coupler 20 is connected to the optical input port of the optical phase modulator 6 .
[0032] The second port of the first 2×2 optical coupler 1 is connected to the first port of...
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Abstract
The invention discloses an optical wavelength interlacing filter with the bandwidth allocation characteristics adjustable and belongs to the field of optical fiber communication. The optical wavelength interlacing filter with the bandwidth allocation characteristics adjustable overcomes the defects that the bandwidth of channels with the serial number being odd numbers and even numbers is not adjustable, loss is large and cost is high. According to the interlacing filter, the first port of a 1*2 optical coupler (20) is connected with an input wavelength division multiplexing signal (10), the second port of the 1*2 optical coupler (20) is connected with the first port of a first 2*2 optical coupler (1), and the third port of the 1*2 optical coupler (20) is connected with the first port of a second 2*2 optical coupler (2) through an optical phase modulator (6); the second port and the third port of the first 2*2 optical coupler are connected with the second port and the third port of a third 2*2 optical coupler (3) through a first doped optical fiber (11) and a second doped optical fiber (12) respectively, and the fourth port of the first 2*2 optical coupler is connected with the second port of the second 2*2 optical coupler; the third port and the fourth port of the second 2*2 optical coupler are connected with an odd-number output channel (7) and an even-number output channel (8) respectively; the first port and the fourth port of the third 2*2 optical coupler are connected with a first pump light source (91) and a second pump light source (92) respectively.
Description
technical field [0001] The invention relates to the field of optical fiber communication, in particular to an optical wavelength interleaved filter with adjustable bandwidth distribution characteristics. Background technique [0002] With the rapid development of optical fiber communication technology and the maturity of multimedia communication technology, people's demand for high speed and broadband is increasing. Optical wavelength division multiplexing (WDM) can greatly reduce the cost of network construction by coupling multiple optical signals of different wavelengths into one optical fiber for transmission without setting up new optical fiber lines. However, with the continuous reduction of channel spacing in Dense Wavelength Division Multiplexing (DWDM), more stringent requirements are placed on the performance of filter devices at network nodes, so optical interleaved filters are emerging. The optical wavelength interleaving filter can form a periodic, center wavel...
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