Broadband spectrum frequency comb laser

Abstract

The invention discloses a broadband spectrum frequency comb laser which comprises a frequency comb laser source, an external laser source, a circulator and an isolator, the circulator is provided with a plurality of ports for sequentially transmitting laser, the external laser source, the frequency comb laser source and the isolator are sequentially in butt joint with the ports of the circulator from front to back respectively, and the frequency comb laser source is a quantum dot laser. The frequency comb can be directly generated by adopting the material of the quantum dot technology, the externally injected single-mode laser can also be manufactured by using the same material, finally, monolithic integration can be realized, and the integration level is very high. Due to the non-uniform broadening characteristic of the quantum dots, a spectrum wider than a quantum well structure is brought, due to the four-wave mixing effect of the quantum dots, an optical frequency comb is more easily generated, and the generated frequency comb has better optical characteristics. The optical frequency comb can be further stabilized through injection locking, aspectrum shaping output flat-topped frequency comb light source is achieved by adjusting injection locking wavelength, and the frequency comb light source can be used as an ideal frequency comb light source in a future wavelength division multiplexing system.

Description

【Technical field】 [0001] The invention relates to the field of optoelectronics, in particular to a wide spectrum frequency comb laser. 【Background technique】 [0002] The rapid development of Internet technology has brought massive data to be stored and transmitted, and subsequently put forward higher requirements for the bandwidth of optical communication and data centers. Compared with the coherent communication technology used for long-distance transmission, the wavelength division multiplexing technology has the characteristics of high bandwidth and low cost. However, the current wavelength division multiplexing technology is mostly 4-wave coarse wavelength division multiplexer (CWDM) and dense wavelength division Multiplexer (DWDM) technology. With the development of the times, 800G optical modules will use 8-channel wavelength division multiplexing in the future. The increased channels require 8 or more semiconductor lasers with different wavelengths for each optical ...

AI Technical Summary

Problems solved by technology

However, the existing multi-wavelength laser micro-assembly has the problems of high cost, high power consumption, and poor scalability

For example, when multiple laser chips with different wavelengths are used for wavelength division multiplexing and assembled into optical emission components through packaging, due to the problem of laser yield, multiple lasers with different stable wavelengths greatly increase the manufacturing cost of emission components.

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