High-speed laser

Abstract

The invention discloses a high-speed laser. The high-speed laser comprises a shell, a laser chip heat sink, a laser chip, a backlight detection chip, a detection chip heat sink and a thermoelectric refrigerator are arranged in the shell, a tube socket and a tube cap are coaxially packaged in the shell, one side of the thermoelectric refrigerator is arranged on the tube socket, the other side is arranged below the substrate,the detection chip heat sink and the thermistor are arranged above the substrate, the laser chip is attached to the laser chip heat sink, and the backlight detection chip is attached to the detection chip heat sink; and the thermoelectric refrigerator comprises a semiconductor refrigeration sheet, a heat conduction sheet and a heat dissipation sheet, the conductor refrigeration sheet is fixed between the heat conduction sheet and the heat dissipation sheet, and both the space between the semiconductor refrigeration sheet and the heat conduction sheet and the space between the semiconductor refrigeration sheet and the heat dissipation sheet are filled with insulating heat conduction colloid, so that the refrigeration effect is improved, the chirp effect is avoided, and high-speed, long-distance and stable-wavelength transmission of the laser is realized.

Description

technical field [0001] The invention belongs to the technical field of optical communication devices, in particular to a high-speed laser. Background technique [0002] Semiconductor laser is a light source device in optical fiber communication, which has the characteristics of direct electro-optic conversion, fast response, small size, and long life. There are mainly two modulation methods of semiconductor laser signals: direct modulation laser (DFB laser) and external modulation laser (EML laser). Directly modulated laser is to modulate the output of laser by changing the input current. DFB laser has become the main light source in optical fiber communication due to its characteristics of dynamic single mode and fast response. [0003] Usually, if the temperature of the DFB laser is not controlled, the chirp effect is likely to occur, and it is difficult to achieve wavelength division multiplexing to achieve long-distance transmission. The existing semiconductor laser ad...

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Problems solved by technology

[0004] However, this structure only uses a thermoelectric cooler to control the working temperature of the laser emitter, and one of the shortcomings of the existing thermoelectric cooler is that the thermoelectric conversion rate is low, the cooling temperature difference between the cold end and the hot end is small, and the cooling efficiency is low.

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