Double-SOA (service oriented architecture) fast switching method
By introducing analog switches into the dual SOA optical module, the problem of optical path in the dual SOA optical module is solved, and the simultaneous control and optical path stability of the dual SOA are achieved, simplifying the operation process.
Patent Information
- Application Number
- CN202411705331.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-01-14
AI Technical Summary
In dual SOA optical modules, the existing SOA control method is difficult to achieve stable optical switching functions, resulting in unstable light output, because the simultaneous control of the two IDACs is difficult, and the simple expansion channel cannot adapt to the inconsistent operation of the two SOAs.
By introducing analog switches in dual SOA, connecting IDAC and SOA, and connecting the control pins of the analog switch to the same control signal, ensuring simultaneous control of both SOAs, a first-level analog switch is added to achieve stability of optical amplification and light absorption sex.
The simultaneous control of dual SOA is realized, ensuring the stability of the optical path, and allowing the optical amplification and light absorption sequence of SOA to be configured, simplifying the operation process.
Smart Images
Figure CN119310692A_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to the technical field of optical modules, and in particular to a method for fast switching of dual SOAs. [Background technology]
[0002] In most optical modules that use SOA (semiconductor optical amplifier) as internal optical devices, generally only one SOA is used for light amplification. When used in the module, one IDAC (current-mode DAC) is used as the power supply for the SOA, and the light energy is completely turned off by turning off the IDAC.
[0003] The SOA of an optical device is used to adjust the optical output power of the device. In optical module applications, by applying different currents to the SOA, the final light output will also be different. When a reverse current is applied to the SOA, the SOA will change from light amplification to light absorption, and the light can be turned on and off by this method.
[0004] The mainstream solutions on the market now have only one SOA internally, so the operation method of SOA is relatively easy to implement.
[0005] However, there are still some optical modules that use two SOAs as internal devices. In this case, if two IDACs are used directly to power the SOAs on the module side, the light can be turned off normally. However, when realizing the light-on function, the two IDACs are difficult to control at the same time, resulting in unstable light output.
[0006] The existing SOA control method is only applicable to the operation of single-channel SOA. For the application scenario of dual-SOA, if the channel is simply expanded from single-channel to dual-channel, the inconsistency of the operation of the two-channel SOA will easily lead to unstable optical path. [Summary of the invention]
[0007] In order to overcome the above problems, the present invention proposes a dual SOA fast switching method which can effectively solve the above problems.
[0008] A technical solution provided by the present invention to solve the above technical problem is: a method for fast switching of dual SOAs is provided, comprising SOA1 and SOA2, wherein SOA1 is connected to analog switch 1, SOA2 is connected to analog switch 2, control pin IN1 of analog switch 1 and control pin IN2 of analog switch 2 are connected to the same control signal; analog switch 1 is connected to IDAC1, analog switch 2 is connected to IDAC2, and analog switch 1 and analog switch 2 are connected to the same negative pressure.
[0009] Preferably, the SOA1 is connected to the COM1 terminal of the analog switch 1 , and the SOA2 is connected to the COM2 terminal of the analog switch 2 .
[0010] Preferably, the output pin OUT1A of the analog switch 1 is connected to IDAC1, and the output pin OUT1B of the analog switch 1 is connected to a negative voltage.
[0011] Preferably, the output pin OUT2A of the analog switch 2 is connected to IDAC2, and the output pin OUT2B of the analog switch 2 is connected to a negative voltage.
[0012] Preferably, the analog switch 1 and the analog switch 2 form a two-way analog switch.
[0013] Compared with the prior art, the dual SOA fast switching method of the present invention adds an additional level of analog switch between IDAC and SOA. When the control pins of multiple analog switches are connected together, multiple paths can be optically amplified or optically absorbed at the same time, ensuring the stability of the optical path; when connected separately, the order of optical amplification and optical absorption of each SOA can be arbitrarily configured, which is extremely convenient.
Brief Description of the Drawings
[0014] Figure 1 This is a principle block diagram of the dual SOA fast switching method of the present invention. [Specific implementation method]
[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0016] It should be noted that in the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back, etc.) are limited to relative positions on the specified view, rather than absolute positions.
[0017] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0018] See also Figure 1 The dual SOA fast switching method of the present invention includes SOA1 and SOA2, wherein SOA1 is connected to analog switch 1, and SOA2 is connected to analog switch 2, and the control pin IN1 of analog switch 1 and the control pin IN2 of analog switch 2 are connected to the same control signal.
[0019] The analog switch 1 is connected to IDAC1, the analog switch 2 is connected to IDAC2, and the analog switch 1 and the analog switch 2 are connected to the same negative pressure.
[0020] An analog switch is an electronic component used in electronic devices to complete the signal switching function in the signal chain. It mainly controls the signal path through the characteristics of analog devices (such as JFET or MOS tube) and can switch different signals.
[0021] Connect SOA to the COM terminal of the analog switch, and connect the two outputs to IDAC and negative pressure respectively. By changing the control pin of the analog switch, you can inform SOA whether it is connected to IDAC or negative pressure. Because it is an analog switch, the signal switching time is short enough to be ignored. Select two analog switches, and connect the control pins of these two analog switches together, and control them with the same signal to achieve simultaneous control of two SOAs.
[0022] The SOA1 is connected to the COM1 terminal of the analog switch 1 , and the SOA2 is connected to the COM2 terminal of the analog switch 2 .
[0023] The output pin OUT1A of the analog switch 1 is connected to IDAC1, and the output pin OUT1B of the analog switch 1 is connected to a negative voltage.
[0024] The output pin OUT2A of the analog switch 2 is connected to IDAC2, and the output pin OUT2B of the analog switch 2 is connected to a negative voltage.
[0025] The analog switch 1 and the analog switch 2 form a two-way analog switch.
[0026] The two-way analog switch chip can be replaced with a dual-way analog switch chip, which can reduce the board area and optimize the board circuit.
[0027] Working principle: When the control signal is at a high level, SOA1 is connected to IDAC1, and SOA2 is connected to IDAC2, realizing the optical amplification function of the two SOAs; when the control signal is at a low level, SOA1 and SOA2 are connected to negative voltage at the same time to realize the light absorption function of SOA, that is, to close the optical path of the optical module; after closing the optical path, the control signal is switched to a high level again, and the two SOAs are connected to their corresponding IDACs at the same time to realize the stable opening of the optical path.
[0028] Compared with the prior art, the dual SOA fast switching method of the present invention adds an additional level of analog switch between IDAC and SOA. When the control pins of multiple analog switches are connected together, multiple paths can be optically amplified or optically absorbed at the same time, ensuring the stability of the optical path; when connected separately, the order of optical amplification and optical absorption of each SOA can be arbitrarily configured, which is extremely convenient.
[0029] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any modifications, equivalent substitutions and improvements made within the concept of the present invention should be included in the patent protection scope of the present invention.
Claims
1. A method for fast switching of dual SOAs, characterized in that: It includes SOA1 and SOA2, wherein SOA1 is connected to analog switch 1, SOA2 is connected to analog switch 2, and a control pin IN1 of analog switch 1 and a control pin IN2 of analog switch 2 are connected to the same control signal; The analog switch 1 is connected to IDAC1, the analog switch 2 is connected to IDAC2, and the analog switch 1 and the analog switch 2 are connected to the same negative pressure.
2. The method for fast switching of dual SOAs according to claim 1, characterized in that: The SOA1 is connected to the COM1 terminal of the analog switch 1 , and the SOA2 is connected to the COM2 terminal of the analog switch 2 .
3. The method for fast switching of dual SOAs according to claim 1, characterized in that: The output pin OUT1A of the analog switch 1 is connected to IDAC1, and the output pin OUT1B of the analog switch 1 is connected to a negative voltage.
4. The method for fast switching of dual SOAs according to claim 1, characterized in that: The output pin OUT2A of the analog switch 2 is connected to IDAC2, and the output pin OUT2B of the analog switch 2 is connected to a negative voltage.
5. The method for fast switching of dual SOAs according to claim 1, characterized in that: The analog switch 1 and the analog switch 2 form a two-way analog switch.