Delay device aiming at asynchronous advance requirements

Abstract

The invention discloses a time delay device aiming at asynchronous stepping requirements, which comprises at least two sets of time delay mechanisms which are arranged in parallel and can work independently, and the time delay stepping of each set of time delay mechanism is different; the time delay mechanisms are optical time delay mechanisms or electric time delay mechanisms at the same time. According to the invention, a plurality of sets of time delay mechanisms are connected in parallel in one set of time delay device, the working requirements of a plurality of sets of time delay devices are met, that is, the functions realized by the plurality of sets of time delay devices are integrated in one set of time delay device, the integration level is high, and the use is convenient.

Description

Technical Field

[0001] The present invention relates to the field of optical communication technology, and in particular to a delay device for meeting different step requirements. Background Art

[0002] Delay technology is a technology that delays signals by changing the length of the path that the signal travels. In information technology, delay technology plays a very important role. For example, in communication systems, delay technology can be used to achieve time division multiplexing and demultiplexing of signals; in optical switching networks, delay technology can be used to solve packet competition problems; in areas such as live video broadcasting and precision guidance, delay technology support is also needed.

[0003] Normally, a delay device can only provide one delay step, and all delay values ​​are integer multiples of the delay step. But sometimes users need one delay step in a certain range, and another delay step in another range, such as requiring a 3.3ns step within 10ns to 100ns, and a 16ns step within 100ns to 15000ns. Because 16ns is not an integer multiple of 3.3ns, it cannot be achieved with a delay device with a 3.3ns step.

[0004] Or in some cases, the two steps required by the user are quite different, and the longest delay is relatively long. If all are to be achieved with relatively small steps, many switch levels will be required, the entire delay device is not streamlined enough, and the initial delay length will be relatively long. For example, the step is required to be 1ns within 0ns~50ns; the step is 50ns within 50ns~25000ns. If all steps within the range of 25000ns are to be achieved with 1ns steps, more than a dozen levels of delay are required. If all are to be achieved with 1×2 and 2×2 switches, 14 2×2 switches are required, and the initial delay will be relatively long.

[0005] When encountering the above requirements, the existing delay device cannot provide different delay steps at the same time to meet the different step requirements of users. Summary of the invention

[0006] The present invention proposes a delay device for different stepping requirements. The device includes at least two delay mechanisms with inconsistent delay steps in the same structure, which can simultaneously meet different delay stepping requirements of users.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A delay device for different step requirements includes at least two sets of delay mechanisms which are arranged in parallel and can work independently, each set of delay mechanisms has a different delay step; each set of delay mechanisms is simultaneously an optical delay mechanism or simultaneously an electrical delay mechanism.

[0009] Preferably, the delay mechanism is N sets of optical delay mechanisms, and the N sets of optical delay mechanisms share the same set of lasers and detectors.

[0010] Preferably, the delay device includes a laser, a first 1×N optical switch, N optical switch groups arranged in parallel, a second 1×N optical switch and a detector, and the delay step of each optical switch group is different; the laser is connected to the input port of the first 1×N optical switch, the N output ports of the first 1×N optical switch are sequentially connected to the N input ports of the N optical switch groups, the N output ports of the N optical switch groups are connected to the N input ports of the second 1×N optical switch, and the output ports of the second 1×N optical switch are connected to the detector; each optical switch group includes the first 1×M optical switch, S M×M optical switches with the same structure that are cascaded in sequence, and the second 1×M optical switch. And the number of switches constituting the optical switch group can be the same or different, and can be set according to needs.

[0011] Preferably, M is 2, and / or 4, and / or 8; that is, the optical switches in the N groups of optical switches can be selected from 1×2, 2×2 optical switches, and / or 1×4, 4×4 optical switches, and / or 1×8, 8×8 optical switches. In other words, the types of optical switches in each group of optical switches can be the same or different.

[0012] Preferably, the delay step of each set of delay mechanisms is a non-integer multiple.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The present invention utilizes multiple sets of delay mechanisms arranged in parallel to complete the working requirements of multiple sets of delay devices in one set of delay devices, that is, the functions realized by multiple sets of delay devices are integrated into one set of delay devices, which has high integration and is easy to use; and no matter how many sets of independently working delay mechanisms there are, they can only share one laser and one detector, which has low cost, easy maintenance, strong scalability, good adaptability, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 To construct a parallel structure delay device using 1×2 and 2×2 optical switches. DETAILED DESCRIPTION

[0017] In order to make the purpose and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1As shown, the present invention discloses a delay device for different step requirements, including at least two sets of delay mechanisms arranged in parallel, these delay mechanisms can work independently, each set of delay mechanisms has different delay steps, and the application is switched according to the needs when used. Each set of delay mechanisms in the entire delay device is an optical delay mechanism at the same time, or an electrical delay mechanism at the same time, and one delay device cannot mix optical delay mechanisms and electrical delay mechanisms.

[0019] As a preferred embodiment, the delay mechanism is N sets of optical delay mechanisms, and the N sets of optical delay mechanisms share the same set of lasers and detectors. Specifically, the delay device includes a laser, a first 1×N optical switch, N sets of optical switch groups arranged in parallel, a second 1×N optical switch and a detector, and the delay step of each optical switch group is different. Of course, the delay step of each optical switch group can also be a non-integer multiple. The laser is connected to the input port of the first 1×N optical switch, the N output ports of the first 1×N optical switch are sequentially connected to the N input ports of the N optical switch groups, the N output ports of the N optical switch groups are connected to the N input ports of the second 1×N optical switch, and the output port of the second 1×N optical switch is connected to the detector. Each optical switch group includes the first 1×M optical switch, S M×M optical switches with the same structure that are cascaded in sequence, and the second 1×M optical switch. M can be 2, and / or 4, and / or 8; that is, the optical switches in the N optical switch groups can be selected as 1×2, 2×2 optical switches, and / or 1×4, 4×4 optical switches, and / or 1×8, 8×8 optical switches. In other words, the types of the optical switch groups can be the same or different.

[0020] like Figure 2 As shown, a parallel structure delay device is constructed using 1×2 and 2×2 optical switches.

[0021] Assume that only 1×2 and 2×2 optical switches are needed to achieve a step of 3.3ns within 10ns to 100ns and a step of 16ns within 100ns to 15000ns. A parallel structure is adopted, and the upper delay mechanism (solid line part) provides delay in the range of 10ns to 100ns at a step of 3.3ns, and the specific delay value of each section of optical fiber is set according to the number in the figure (unit ns); the lower delay mechanism (dashed line part) provides delay in the range of 100ns to 15000ns at a step of 16ns, and the specific delay value of each section of optical fiber is set according to the number in the figure (unit ns). The upper and lower delay mechanisms share the same set of lasers and detectors, and the output and input ports of the 1×2 and 2×2 optical switches in each mechanism are fused in sequence according to the set length. The shortest delay that the delay mechanism in the upper part needs to achieve is 10ns, and the longest delay that can be achieved according to this structure is 112.3ns, with a step of 3.3ns; the shortest delay that the delay mechanism in the lower part needs to achieve is 100ns, and the longest delay that can be achieved according to this structure is 16468ns, with a step of 16ns.

[0022] like Figure 2 As shown, the parallel structure delay device proposed in the present invention can simultaneously achieve the delay requirements of 3.3ns in steps within 10ns to 100ns and 16ns in steps within 100ns to 15000ns, and only uses one laser and one detector, which is low in cost, easy to maintain, strong in scalability, good in adaptability, and has broad application prospects.

[0023] The above embodiments are only specific examples for further describing the purpose, technical solutions and beneficial effects of the present invention, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement, etc. made within the scope of the disclosure of the present invention are included in the protection scope of the present invention.

Claims

1. A time delay device for different step requirements, characterized by: It comprises at least two sets of delay mechanisms which are arranged in parallel and can work independently, each set of delay mechanisms has a different delay step; each set of delay mechanisms is simultaneously an optical delay mechanism or simultaneously an electrical delay mechanism.

2. A time delay device for different step requirements according to claim 1, characterized in that: The delay mechanism is N sets of optical delay mechanisms, and the N sets of optical delay mechanisms share the same set of lasers and detectors.

3. A time delay device for different step requirements according to claim 2, characterized in that: The delay device comprises a laser, a first 1×N optical switch, N optical switch groups arranged in parallel, a second 1×N optical switch and a detector, and the delay step of each optical switch group is different; the laser is connected to the input port of the first 1×N optical switch, the N output ports of the first 1×N optical switch are sequentially connected to the N input ports of the N optical switch groups, the N output ports of the N optical switch groups are connected to the N input ports of the second 1×N optical switch, and the output ports of the second 1×N optical switch are connected to the detector; each optical switch group comprises a first 1×M optical switch, S M×M optical switches with the same structure that are cascaded in sequence, and a second 1×M optical switch.

4. A time delay device for different step requirements according to claim 3, characterized in that: M is 2, and / or 4, and / or 8; that is, the optical switches in the N optical switch groups can be 1×2, 2×2 optical switches, and / or 1×4, 4×4 optical switches, and / or 1×8, 8×8 optical switches.

5. A time delay device for different step requirements according to claim 1, characterized in that: The delay step of each set of delay mechanisms is a non-integer multiple.

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