An adjustable vcsel evaluation module

Abstract

This utility model discloses an adjustable VCSEL evaluation module, comprising an upper cover, a lower cover, end caps, and a circuit board. The upper and lower covers are fastened together to form an open cavity, and the end caps are positioned at both ends of the cavity to form a closed cavity. The circuit board is disposed within the closed cavity and integrates an MCU, an FPGA, an adjustment module, a signal processing module, a display module, a communication module, a power supply module, a trigger output interface, a trigger input interface, and a VCSEL laser interface. The display module, adjustment module, and communication module are all electrically connected to the MCU. The MCU is electrically connected to the FPGA. The FPGA is electrically connected to the trigger output interface and the input / output interface. The FPGA is electrically connected to the VCSEL laser interface through the signal processing module. The advantages of this utility model are: diverse control methods, allowing selection of three VCSEL control methods—DC, AC internal triggering, and AC external triggering—through the adjustment module and display module; stable drive control for the same type; and the ability to test or drive VCSEL lasers.

Description

Technical Field

[0001] This utility model relates to the field of laser and optoelectronic technology, and in particular to an adjustable VCSEL evaluation module. Background Technology

[0002] Currently, tunable vertical-cavity surface-emitting lasers (VCSELs) are typically packaged in 7-pin coaxial packages and have significant applications in optical communication, sensing, and spectral analysis. However, due to significant performance differences among different VCSEL devices, such as inconsistencies in scanning voltage range, output wavelength tuning characteristics, and driving conditions, personalized testing and driver adaptation are required for specific devices in practical applications.

[0003] Currently, there is a lack of a universal evaluation platform that can accommodate the diverse needs of such VCSELs. Traditional testing methods often require the design of dedicated circuits and software for specific laser models or batches, resulting in long development cycles, high costs, and difficulty in meeting the requirements for rapid verification and batch testing. In addition, manually adjusting drive parameters is inefficient and may affect the accuracy of test results due to operational errors.

[0004] Therefore, there is an urgent need for a universal and scalable evaluation platform that can be adapted to 7-pin coaxial package tunable VCSELs of different specifications, enabling efficient testing and driving of key parameters such as scanning voltage and wavelength tuning, thereby improving device development and application efficiency and reducing testing costs. Summary of the Invention

[0005] This invention mainly solves the above-mentioned problems and provides an adjustable VCSEL evaluation module that can be adapted to 7-pin coaxial packaged tunable VCSELs of different specifications, enabling efficient testing and driving of key parameters such as scanning voltage and wavelength tuning.

[0006] The technical solution adopted by this utility model to solve its technical problem is an adjustable VCSEL evaluation module, including an upper cover, a lower cover, an end cover, and a circuit board. The upper and lower covers are fastened together to form an open cavity, and the end covers are set at both ends of the cavity to form a closed cavity. The circuit board is set in the closed cavity. The circuit board integrates an MCU, an FPGA, an adjustment module, a signal processing module, a display module, a communication module, a power supply module, a trigger output interface, a trigger input interface, and a VCSEL laser interface. The display module, the adjustment module, and the communication module are all electrically connected to the MCU. The MCU is electrically connected to the FPGA. The FPGA is electrically connected to the trigger output interface and the output input interface. The FPGA is electrically connected to the VCSEL laser interface through the signal processing module.

[0007] As a preferred embodiment of the above solution, the adjustment module is an adjustment knob.

[0008] As a preferred embodiment of the above scheme, the signal processing module includes a DAC circuit, a non-inverting amplifier, and an inverting amplifier connected in sequence, and the output terminal of the inverting amplifier is electrically connected to the VCSEL laser interface.

[0009] As a preferred embodiment of the above solution, the communication module includes a USB communication circuit, an RS485 communication circuit, and a USB / RS485 switching circuit.

[0010] As a preferred embodiment of the above solution, the VCSEL laser interface is vertically arranged on the circuit board, and the upper cover has a through hole corresponding to the VCSEL laser interface.

[0011] As a preferred embodiment of the above solution, mounting plates extend from both sides of the lower cover, and mounting holes are provided on the mounting plates.

[0012] As a preferred embodiment of the above solution, the end cover includes a cover plate and a surrounding plate arranged around the cover plate. The surrounding plate is attached to the outer wall of the open cavity. The surrounding plate has a notch at the mounting plate. The cover plate is fixed to the sides of the upper and lower covers by bolts.

[0013] The advantages of this invention are: it offers diverse control methods, allowing selection of three VCSEL control modes—DC, AC internal triggering, and AC external triggering—through the adjustment module and display module; it enables stable drive control of similar types and allows for testing or driving of VCSEL lasers. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the adjustable VCSEL evaluation module.

[0015] Figure 2 This is a block diagram of the circuit board.

[0016] 1-Top cover 2-Lower cover 3-End cover 4-Adjustment knob 5-Display screen 6-VCSEL laser interface 7-Trigger input interface 8-Trigger output interface 9-Mounting plate 10-Mounting hole Detailed Implementation

[0017] The technical solution of this utility model will be further described below through embodiments and in conjunction with the accompanying drawings.

[0018] Example:

[0019] This embodiment provides an adjustable VCSEL evaluation module, such as... Figure 1As shown, the device includes an upper cover 1, a lower cover 2, an end cover 3, and a circuit board. The upper cover 1 and the lower cover 2 are fastened together to form an open cavity. The end cover 3 is located at both ends of the cavity to form a closed cavity, and the circuit board is placed in the closed cavity. Mounting plates 9 extend from both sides of the lower cover 2, and mounting holes 10 are provided on the mounting plates. The end cover 3 includes a cover plate and a surrounding plate. The surrounding plate is attached to the outer wall of the open cavity, and a notch is provided on the surrounding plate corresponding to the mounting plate. The cover plate is fixed to the sides of the upper and lower covers by bolts.

[0020] like Figure 2 The circuit board integrates an MCU, an FPGA, an adjustment module, a signal processing module, a display module, a communication module, a power supply module, a trigger output interface, a trigger input interface, and a VCSEL laser interface. The display module, adjustment module, and communication module are all electrically connected to the MCU. The MCU is electrically connected to the FPGA. The FPGA is electrically connected to the trigger output interface and the input / output interface. The FPGA is electrically connected to the VCSEL laser interface through the signal processing module. The signal processing module includes a DAC circuit, a non-inverting amplifier, and an inverting amplifier connected in sequence. The output of the inverting amplifier is electrically connected to the VCSEL laser interface. The communication module includes a USB communication circuit, an RS485 communication circuit, and a USB / RS485 switching circuit.

[0021] The adjustment module is the adjustment knob 4, and the display module is the display screen 5. The VCSEL laser interface 6 is a 7-pin interface, which is vertically set on the circuit board, and the upper cover 1 has a through hole corresponding to the VCSEL laser interface. In addition, the USB interface, RS485 interface, USB / RS485 switch, trigger output interface 8, and input / output interface 7 corresponding to the communication module are all located on the end cover.

[0022] In this embodiment, the adjustable VCSEL evaluation module uses an STM8 chip as its MCU. During use, the user controls and selects the VCSEL control scheme through the display screen and adjustment knob. The VCSEL control scheme includes three schemes: DC, AC internal trigger, and AC external trigger. After receiving the user's selection signal, the STM8 chip transmits the data to the FPGA for processing through the IIC communication protocol and sends the control signal to the DAC device. The voltage is amplified by two stages to generate the VCSEL control voltage, thereby completing the drive control of the VCSEL.

[0023] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An adjustable VCSEL evaluation module, characterized in that: The device includes an upper cover, a lower cover, end caps, and a circuit board. The upper and lower covers are fastened together to form an open cavity. The end caps are positioned at both ends of the cavity to form a closed cavity. The circuit board is disposed in the closed cavity. The circuit board integrates an MCU, an FPGA, an adjustment module, a signal processing module, a display module, a communication module, a power supply module, a trigger output interface, a trigger input interface, and a VCSEL laser interface. The display module, the adjustment module, and the communication module are all electrically connected to the MCU. The MCU is electrically connected to the FPGA. The FPGA is electrically connected to the trigger output interface and the output input interface. The FPGA is electrically connected to the VCSEL laser interface through the signal processing module.

2. The adjustable VCSEL evaluation module according to claim 1, characterized in that: The adjustment module includes an adjustment knob.

3. The adjustable VCSEL evaluation module according to claim 1, characterized in that: The signal processing module includes a DAC circuit, a non-inverting amplifier, and an inverting amplifier connected in sequence. The output of the inverting amplifier is electrically connected to the VCSEL laser interface.

4. The adjustable VCSEL evaluation module according to claim 1, characterized in that: The communication module includes a USB communication circuit, an RS485 communication circuit, and a USB / RS485 switching circuit.

5. The adjustable VCSEL evaluation module according to claim 1, characterized in that: The VCSEL laser interface is vertically mounted on the circuit board, and the upper cover has a through hole corresponding to the VCSEL laser interface.

6. The adjustable VCSEL evaluation module according to claim 1, characterized in that: Mounting plates extend from both sides of the lower cover, and mounting holes are provided on the mounting plates.

7. The adjustable VCSEL evaluation module according to claim 6, characterized in that: The end cap includes a cover plate and a surrounding plate arranged around the cover plate. The surrounding plate is attached to the outer wall of the open cavity. The surrounding plate has a notch at the mounting plate. The cover plate is fixed to the sides of the upper and lower covers by bolts.

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