A laser module for coherent lidar

Abstract

The invention discloses a laser module for coherent laser radar. The laser module for coherent laser radar provided by the present invention only needs a continuous laser as a seed light source and a laser pulse modulation module, and can output multiple local oscillator lights and signal lights at the same time, thereby achieving multi-beam and multi-angle targets probing. Adopting the solution of the invention not only increases the compactness of the overall structure of the laser, but also reduces power consumption and cost. The input light sources of the multi-channel signal light all come from the same light source, thus effectively ensuring the consistency of the parameters of the output laser. A single seed source module brings a single pulse timing reference, and the only timing reference can be used to precisely control the light output delay of the subsequent optical path, which greatly improves the transceiver and measurement accuracy of the lidar system.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a laser module for coherent laser radar. Background technique [0002] The existing narrow-linewidth nanosecond pulsed fiber lasers used for lidar are usually 1X1 modules, that is, a seed source module and an optical amplifier module. The inventors of the present invention have found through research that: since a single optical amplifier module is mounted on a radar transmitter, the measured range is limited, and multiple 1X1 modules are placed in a measurement system, not only the cost is very high, but also because the timing reference of each module is different Similarly, it is difficult to precisely modulate the laser pulse delay of each optical amplifier module, so it is difficult to achieve large-scale, high-precision measurement. Contents of the invention [0003] In order to solve the above problems, the present invention provides a laser module for coherent lidar, in...

AI Technical Summary

Problems solved by technology

The inventors of the present invention have found through research that: since a single optical amplifier module is mounted on a radar transmitter, the measured range is limited, and multiple 1X1 modules are placed in a measurement system, not only the cost is very high, but also because the timing reference of each module is different Similarly, it is difficult to precisely modulate the laser pulse delay of each optical amplifier module, so it is difficult to achieve large-scale, high-precision measurement

Images