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Tunable coupled cavity semiconductor laser

A coupled cavity and semiconductor technology, applied in the field of tunable coupled cavity semiconductor lasers, can solve problems such as complex processes, achieve the effects of simple manufacturing process, high yield and reliability, and overcome high manufacturing precision requirements

Active Publication Date: 2021-04-06
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the process of tunable lasers adjusted based on gratings is very complicated due to the need for secondary epitaxy and high-precision gratings in the manufacturing process.

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  • Tunable coupled cavity semiconductor laser
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Embodiment Construction

[0039]Whispering gallery mode microcavity utilizes the total reflection of light at the interface to form a resonant mode. It has the advantages of small size, low threshold, low power consumption, and easy integration. It is widely used in photonic integrated circuits, optical interconnections, optical communications, and microwave photonics. and other fields. Compared with traditional semiconductor lasers, due to its high quality factor and small size, it has shown obvious advantages in direct high-speed modulation. However, the whispering gallery mode microcavity laser has a smaller cavity volume and lower output power than traditional lasers, so a certain trade-off needs to be made between the output power and the single-mode nature of the cavity. In addition, in the prior art, although the coupling cavity structure formed by conventionally shaped whispering gallery microcavities such as disk, circular, regular polygon or ellipse and FP cavity has significantly improved th...

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Abstract

A tunable coupled cavity semiconductor laser, comprising: an FP cavity; a modified whispering gallery microcavity connected to the first end of the FP cavity as a reflective end face of the FP cavity, the modified whispering gallery microcavity is formed with the FP cavity A coupling cavity structure; and an electrical isolation groove, which is arranged between the FP cavity and the modified whispering gallery microcavity; wherein, light can enter the modified whispering gallery microcavity from the FP cavity, and pass through several times in the modified whispering gallery microcavity. After the secondary reflection, the light of a specific wavelength is reflected back into the FP cavity. The coupled mode of the tunable coupled cavity laser accounts for a high proportion of the fundamental mode of the FP intracavity mode, thereby reducing the loss of light in the FP cavity, and at the same time making the coupled cavity lasing mode more stable and the output power higher; at the same time , the equivalent reflectivity spectrum of the modified whispering gallery microcavity is insensitive to the gain change in the cavity, and the lasing mode is not easy to jump to the adjacent longitudinal mode, so that the tunable coupled cavity laser can obtain a large wavelength tuning range.

Description

technical field [0001] The disclosure belongs to the technical fields of optical fiber communication and semiconductor lasers, and relates to a tunable coupling cavity semiconductor laser. Background technique [0002] Wavelength tunable lasers are an important part of wavelength division multiplexing systems, and also one of the key components of photonic integrated circuits and next-generation reconfigurable optical networks. With the rapid development of optical communication technology, tunable semiconductor lasers are constantly moving towards low cost, low power consumption, high side mode suppression ratio, high output power, high wavelength switching speed, narrow linewidth and monolithic integration, and high direction of modulation rate. Starting from practical applications, it is required that tunable lasers can be tuned in a wide range, low in cost, stable in operation and easy to operate. [0003] Currently, commercially available monolithically integrated wid...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/10
CPCH01S5/1021H01S5/1039H01S5/1042
Inventor 郝友增黄永箴杨跃德肖金龙王福丽汤敏翁海中
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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