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Laser chip

A laser and chip technology, applied in the laser field, can solve the problems of difficult to guarantee linearity, complex system, and the repetition frequency of frequency modulation is limited to the order of kHz, so as to achieve the effect of improving performance and reliability and reducing volume.

Pending Publication Date: 2022-05-06
SUZHOU LEIZHI SENSOR TECH CO LTD
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Problems solved by technology

[0004] However, in the prior art, the laser frequency is modulated by modulating the effective cavity length of the laser, and the linearity is difficult to guarantee; the laser linear frequency modulation technology is realized by photoelectric feedback technology, the system is relatively complicated, and the frequency modulation repetition frequency is usually limited to kHz class

Method used

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0042] Optoelectronic integrated circuit (OEIC) is an inevitable direction for the development of optoelectronics in the future. Driven by optical communication and data center communication, OEIC has achieved considerable development, and in the future, a large number of integrated optoelectronic applications in the fields of 5G, autonomous driving sensors, and consumer electronics will also appear. At present, OEIC involves a variety of material platforms, such as indium phosphide (InP), gallium arsenide (GaAs),...

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Abstract

The invention discloses a laser chip. The laser chip comprises an optical module; the optical module is integrated on the laser chip; the optical module comprises a first laser, a modulation unit, a second laser, a first coupling unit and a second coupling unit. The first laser is used for outputting laser beams; the first coupling unit is arranged between the first laser and the modulation unit and is used for coupling the laser beam to the modulation unit; the modulation unit is used for generating a single-stage or multi-stage modulation sideband according to the linear frequency modulation microwave signal and the laser beam; the second coupling unit is arranged between the modulator and the second laser and is used for coupling the modulation sideband to the second laser; the second laser is used for outputting linear frequency modulation laser according to the modulation sideband; the frequency of the linear frequency modulation laser is related to the frequency of a certain sideband of the modulation sideband. The single-frequency narrow-linewidth linear frequency modulation light source with high side-mode rejection ratio, high repetition frequency, large broadband and high linear frequency modulation is generated, and due to the fact that all optical devices are integrated in a chip, the size is small, and the cost is low.

Description

technical field [0001] Embodiments of the present invention relate to the field of laser technology, and in particular, to a laser chip. Background technique [0002] Lasers with narrow linewidth and large range of fast chirp have important and extensive application requirements in cutting-edge basic disciplines and high-tech applications such as lidar, spectroscopy, radio frequency signal generation, and atomic measurement. [0003] At present, narrow-linewidth lasers mainly include solid-state, optical fiber, and external-cavity semiconductors, and their linewidth can reach kilohertz (kHz) or even lower. The way to generate chirp laser can be divided into two categories. The first category is to modulate the effective cavity length of the laser. Since the laser frequency is inversely proportional to the effective cavity length, the laser frequency can be modulated by adjusting the cavity length, and the laser cavity directly modulates It is mainly modulated by current (su...

Claims

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Application Information

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IPC IPC(8): H01S5/026H01S5/40H01S5/00
CPCH01S5/4012H01S5/026H01S5/4018H01S5/0057H01S5/00H01S5/40
Inventor 不公告发明人
Owner SUZHOU LEIZHI SENSOR TECH CO LTD
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