An edge-emitting laser and its manufacturing method
An edge-emitting laser and manufacturing method technology, applied in the field of optical communication, can solve the problems of optical field disturbance and signal propagation quality degradation, and achieve the effects of eliminating reflection effects, avoiding signal propagation quality degradation, and reducing optical power.
Active Publication Date: 2021-02-26
HISENSE BROADBAND MULTIMEDIA TECH
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Problems solved by technology
like figure 1 As shown, it is a schematic structural diagram of FP. Since the deep groove between the laser and the detector in FP is generally a rectangle, and the rear end face of the laser is parallel to the front face of the detector, part of the light entering the detector from the laser will be Reflected back, an oscillating cavity is formed between the detector and the laser, and the light is recoupled into the active area of the laser, causing disturbance of the optical field, and the jitter of optical wavelength causes the quality of signal propagation to degrade
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[0022] As mentioned in the background technology, the integration of the laser and the detector in the prior art simplifies the circuit and reduces the power consumption, but in order to ensure the lasing conditions, the front and rear end faces of the laser need to be coated with high reflective film, and the laser and the detector The deep groove between them is generally a rectangle. The rear end face of the laser is parallel to the front face of the detector. Part of the light entering the detector from the laser will be reflected back, forming an oscillating cavity between the detector and the laser, and the light repeats. The reflection is re-coupled into the active area of the laser, causing disturbance of the optical field, which indirectly causes the degradation of signal propagation quality.
[0023] Therefore, in view of the problem in the prior art that the light reflected from the detector unit of the laser enters the active area of the laser unit, this applica...
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The invention discloses an edge-emitting laser. The edge-emitting laser includes a laser unit and a detector unit. Light is emitted to the front end of the detector unit through the rear end surface of the laser unit. Non-parallel, the plane where the rear end face and the front face are located constitutes an irregular polygonal corrosion cavity, and there is a specific regular angle between the cavity surfaces of the corrosion cavity, and the specific regular angle is used to attenuate the light reflected from the detector unit To the preset threshold, the optical power emitted from the front face of the detector unit into the active area of the laser unit is reduced, the reflection effect of the corrosion area is minimized or even eliminated, and the signal propagation quality degradation caused by the disturbance of the optical field is avoided. At the same time, it also discloses a manufacturing method of the edge-emitting laser.
Description
technical field [0001] The invention relates to the technical field of optical communication, in particular to an edge emitting laser. The present invention also particularly relates to a manufacturing method of an edge-emitting laser. Background technique [0002] Edge-emitting lasers are key components in fiber optic communications and data transmission. When the laser is actually used, the output power needs to be monitored to ensure the quality of the eye diagram of the transmitted signal. [0003] A detector (PD) is usually installed on the back face of the laser to monitor the optical power of the back face in real time. This is based on the fact that the output power of the front end is proportional to the change of the output power of the rear end face. If it is found that the PD photocurrent decreases, it means that the output power of the rear end of the laser is reduced, and the system will compensate the driving current through the driving circuit to keep the ...
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IPC IPC(8): H01S5/22H01S5/0683
CPCH01S5/0683H01S5/2202H01S5/2218
Inventor 方瑞禹
Owner HISENSE BROADBAND MULTIMEDIA TECH