CN218525878U - Mid-infrared radiation light-emitting diode - Google Patents
Mid-infrared radiation light-emitting diode Download PDFInfo
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- CN218525878U CN218525878U CN202222315594.8U CN202222315594U CN218525878U CN 218525878 U CN218525878 U CN 218525878U CN 202222315594 U CN202222315594 U CN 202222315594U CN 218525878 U CN218525878 U CN 218525878U
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Abstract
The utility model relates to a mid-infrared radiation light-emitting diode, the key point of the technical proposal is that the light-emitting diode comprises a tube body, the upper part of the tube body is provided with a ridge waveguide, and the ridge waveguide comprises a vertical waveguide, an oblique waveguide and a J-shaped bent waveguide which are connected in sequence; the length direction of the vertical waveguide is parallel to the normal direction of the cavity surface; the J-shaped curved waveguide comprises a straight section part and a hook part, wherein the straight section part is arranged in parallel to the normal direction of the cavity surface in the length direction, and the hook part is in smooth curved transition with the straight section part; the oblique waveguide is obliquely intersected with the vertical waveguide and the J-shaped bent waveguide respectively; the utility model discloses compare in traditional mid infrared radiation emitting diode has smaller volume.
Description
Technical Field
The utility model relates to a diode electron device technical field especially relates to a mid-infrared radiation emitting diode.
Background
The unique operating principle of mid-infrared radiation leds determines their different emission characteristics from conventional leds and lasers. Compared with the common light emitting diode, the mid-infrared radiation light emitting diode is characterized in that the stimulated emission speed of carriers generated by spontaneous emission is greater than the stimulated absorption speed, and the following effects can be brought: (1) The active region of the mid-infrared radiation light-emitting diode reaches the condition of population inversion distribution, has the characteristic of optical gain, and has much higher electro-optic conversion efficiency than the light-emitting diode; (2) The power-current (L-I) curve of the mid-infrared radiation light emitting diode does not change linearly, but shows a nonlinear increase in output power; (3) The super radiant light has weak coherence, and the emission spectrum and the beam divergence angle become small. Compared with a laser, the mid-infrared radiation light emitting diode is characterized in that only one-way optical gain exists in the device, which can bring about: (1) The electro-optic conversion efficiency of the mid-infrared radiation light-emitting diode is much lower than that of a laser, and in order to achieve the same output power as the laser, higher current density needs to be injected; (2) An inflection point (namely a lasing current threshold) does not exist on an L-I curve of the intermediate infrared radiation light emitting diode, and the output power is increased in an ultra-linear mode; (3) The optical power of the mid-ir led is not concentrated around a certain wavelength, but exhibits a wide gaussian spectrum. Therefore, the light-emitting diode has the light-emitting characteristic between that of a laser and that of a light-emitting diode, has higher output power and wider emission spectrum, has the main advantages of the laser and the light-emitting diode, can fill the blank of light sources in many application fields, and has wide development prospect.
The adoption of the array structure is an important means for improving the performance of the mid-infrared radiation light-emitting diode, the mid-infrared radiation light-emitting diode needs to reduce the reflectivity of the cavity surface to inhibit the light oscillation and the mode selection process, but the wave meeting the requirement is often huge in structure and irregular in shape. The two factors cause that the super-radiation array structure occupies huge chip space, and greatly restricts the miniaturization and integration of devices.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a mid infrared radiation emitting diode has smaller volume compared in traditional mid infrared radiation emitting diode.
The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a mid-infrared radiation emitting diode, includes the body, body upper portion is provided with ridge waveguide, its characterized in that: the ridge waveguide comprises a vertical waveguide, an oblique waveguide and a J-shaped bent waveguide which are sequentially connected; the length direction of the vertical waveguide is parallel to the normal direction of the cavity surface; the J-shaped bent waveguide is in a smoothly-transitional hook shape; the oblique waveguide obliquely intersects with the vertical waveguide and the J-shaped bent waveguide respectively.
Preferably, the included angle between the oblique waveguide and the normal direction of the cavity surface is greater than 12 °.
Preferably, the projection lengths of the vertical waveguide, the oblique waveguide and the J-shaped curved waveguide in the normal direction of the cavity surface are sequentially increased.
Preferably, the projection length ratios of the vertical waveguide, the oblique waveguide and the J-type curved waveguide in the cavity surface normal direction are: 1:2:4.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a mid-ir led.
Wherein, 1, a tube body; 2. a vertical waveguide; 3. an oblique waveguide; 4. a J-bend waveguide; 41. a straight section; 42. a hook part is bent.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front", "back", "left", "right", "upper" and "lower" refer to directions in the drawings, and the terms "bottom" and "top", "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The embodiment is as follows:
a mid-infrared radiation light-emitting diode (LED) refers to fig. 1 and comprises a tube body 1, wherein a ridge waveguide is arranged at the upper part of the tube body 1 and comprises a vertical waveguide 2, an oblique waveguide 3 and a J-shaped bent waveguide 4 which are sequentially connected; the length direction of the vertical waveguide 2 is parallel to the normal direction of the cavity surface; the J-shaped curved waveguide 4 is in a smoothly-transitional hook shape; the slant waveguide 3 obliquely intersects the vertical waveguide 2 and the J-bend waveguide 4, respectively.
The projection lengths of the vertical waveguide 2, the oblique waveguide 3 and the J-type curved waveguide 4 in the normal direction of the cavity surface are sequentially increased, and preferably, the projection length ratios of the vertical waveguide 2, the oblique waveguide 3 and the J-type curved waveguide 4 in the normal direction of the cavity surface are as follows: 1:2:4. The included angle between the oblique waveguide 3 and the normal direction of the cavity surface is larger than 12 degrees. In the figure, the projection lengths of the vertical waveguide 2, the diagonal waveguide 3 and the J-type curved waveguide 4 in the normal direction of the cavity surface are L1, L2 and L3, respectively; alpha is the included angle between the oblique waveguide 3 and the normal direction of the cavity surface.
In the waveguide structure of the mid-infrared radiation light emitting diode, how to reduce the reflectivity of the cavity surface to suppress the optical oscillation is an important consideration in the design of the structure in order to maintain the net gain in the cavity below the lasing threshold to prevent the generation of laser light. A common method for reducing the reflectivity of the facet is to tilt the waveguide structure by a certain angle, so that the light exit direction forms a certain angle with the normal direction of the facet. Wherein, the maximum value of the amplified spontaneous emission intensity is determined by the spontaneous emission intensity of the material, the reflectivity of the cavity surface of the device and the cavity length.
The ridge waveguide in the scheme adopts a sectional design, the shapes of the inclined cavity surface, the inclined waveguide and the bent waveguide are compact, the widths of the inclined cavity surface, the inclined waveguide and the bent waveguide are uniform, and the combined structure of the inclined cavity surface, the inclined waveguide and the bent waveguide is favorable for realizing an array device. The reflectivity of the cavity surfaces at two ends of the inclined waveguide is low, so that the overall reflectivity is lowest, and the low reflectivity can be provided for the sectional waveguide. The curved waveguide can further reduce the overall reflectivity of the segmented waveguide structure, and can flexibly adjust the reflectivity by cutting off a certain length of waveguide from the bent end. The sectional waveguide consists of three parts, namely a vertical waveguide 2, an oblique waveguide 3 and a J-shaped bent waveguide 4, and two structural mutations occur in the waveguide structure, so that each component becomes a quasi-resonant cavity for improving the light output while the lower overall reflectivity is provided. Moreover, such a structure enables a wide range of adjustment of the reflectivity by varying the structural parameters.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (4)
1. The utility model provides a mid-infrared radiation emitting diode, includes body (1), body (1) upper portion is provided with ridge waveguide, its characterized in that: the ridge waveguide comprises a vertical waveguide (2), an oblique waveguide (3) and a J-shaped bent waveguide (4) which are connected in sequence; the length direction of the vertical waveguide (2) is parallel to the normal direction of the cavity surface; the J-shaped curved waveguide (4) comprises a straight section part (41) and a hook part (42), wherein the length direction of the straight section part is parallel to the normal direction of the cavity surface, and the hook part and the straight section part (41) are in smooth curved transition; the oblique waveguide (3) is obliquely intersected with the vertical waveguide (2) and the J-shaped bent waveguide (4) respectively.
2. The mid-infrared radiation light emitting diode of claim 1, wherein: the included angle between the oblique waveguide (3) and the normal direction of the cavity surface is larger than 12 degrees.
3. The mid-infrared radiation light emitting diode of claim 1, wherein: the projection lengths of the vertical waveguide (2), the oblique waveguide (3) and the J-shaped bent waveguide (4) in the normal direction of the cavity surface are sequentially increased.
4. A mid-infrared radiation light emitting diode as set forth in claim 3, wherein: the projection length proportion of the vertical waveguide (2), the oblique waveguide (3) and the J-shaped curved waveguide (4) in the normal direction of the cavity surface is as follows: 1:2:4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222315594.8U CN218525878U (en) | 2022-08-31 | 2022-08-31 | Mid-infrared radiation light-emitting diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222315594.8U CN218525878U (en) | 2022-08-31 | 2022-08-31 | Mid-infrared radiation light-emitting diode |
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| Publication Number | Publication Date |
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| CN218525878U true CN218525878U (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222315594.8U Active CN218525878U (en) | 2022-08-31 | 2022-08-31 | Mid-infrared radiation light-emitting diode |
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| CN (1) | CN218525878U (en) |
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2022
- 2022-08-31 CN CN202222315594.8U patent/CN218525878U/en active Active
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