When Tang Rong talked to Yang Jie about the further research and development direction of laser imaging radar technology, he hoped that the array detector would be smaller in size, more integrated, and eventually reach the chip level, and improve the sensitivity of the detector, reduce the system cost, and improve the imaging quality.

Yang Jie also agreed to Tang Rong's request to continue research and development in this regard.

Compared with microwave imaging radar, laser imaging radar has a shorter wavelength and several orders of magnitude higher frequency than microwave, which naturally has advantages in resolution and high-speed imaging, which is why Yang Jie has been investing in research and development of laser imaging radar.

Of course, the development of laser imaging radar technology has only been a few decades now, and the technology research and development in this area at home and abroad is in the ascendant, and there is still a lot of room for development in this technical field.

Although the Laser Physics R&D Center has developed the third-generation laser imaging radar, it still needs a long time of technical testing, and there is still a long way to go before it can be put into practical use.

After Yang Jie left the laser physics R&D center, he also came to the satellite research and development base where China Satellite Communications Corporation is located.

In the R&D center of the base, Yang Jie also inspected the prototype of femtosecond laser communication equipment being developed in the laboratory of the laser communication R&D department.

Now this set of laser communication equipment mounted on the satellite has been manufactured, this set of equipment weighs 64 pounds, and consists of an optical module, a modem module and an electronic module.

Outside the optical module mounted on the exterior of the unit is a 10 cm diameter Cassegrain telescope, which uses a primary concave mirror and an auxiliary convex mirror arranged around the optical axis to focus the light on the detector, mounted on a biaxial gimbal assembly, which is also designed with high-precision dynamic compensation technology system to keep the optics perfectly stable.

Such a device is designed to operate at 137 watts, which is much smaller than that of high-power microwave communication devices.

In fact, the technical department has developed a set of laser communication devices to carry out various technical verification tests on the relay satellite, and the laser communication device on the relay satellite and the ground communication equipment have successfully established a two-way laser link, realizing the verification of 10G high-throughput space laser communication between the two optical stations on the ground and the relay satellite.

The previous laser communication device did not use femtosecond lasers, and now the technical department has also redesigned such a device to conduct ground tests first.

There is not much difference in structure between these two sets of devices, but with the development of semiconductor laser pumping technology and the advent of small high-power lasers developed by Huaxing Technology Group Company, the performance of this femtosecond laser developed by Huaxing Technology Group has been further improved in terms of pulse width and power.

Over the years, Huaxing Technology Group has not only carried out research and development on the laser itself, as a giant company in the field of communication, it will naturally not slack off in the laser communication device.

The research and development of the laser communication device of China Satellite Communications Corporation is transplanted from Huaxing Technology Group Corporation in fiber laser communication technology over the years, and it will naturally not lag behind in space laser communication technology. doll

Now Huaxing Technology Group Co., Ltd. has also developed the mode-locking technology of semiconductor lasers, and the picosecond and sub-picosecond time-domain pulsed light sources have also incorporated these small lasers into communication systems or measurement equipment, which are being popularized and applied.

In the field of aerospace, Yang Jie actually attaches more importance to the research and development of space laser communication technology, which is the natural advantage of laser technology itself, the laser frequency is several orders of magnitude higher than that of microwave, so as the carrier of communication has a greater use of frequency band, the current data rate of a single beam of optical fiber communication can reach more than 20G, through the wavelength division multiplexing technology can be dozens of times the communication capacity, optical communication has a huge advantage over microwave communication.

In addition, the divergence angle of the laser is very small, the energy concentration is very high, and the power density falling on the receiver telescope antenna is high, so the power of the transmitter can be greatly reduced, which is also a great advantage for space communication with very strict satellite payloads.

At present, the Starlink network is mainly based on ultra-high-frequency microwave communication technology, and in order to achieve large-capacity transmission data rate power has reached tens of kilowatts, which is a breakthrough in gallium nitride power device and power synthesizer technology of Huaxing Technology Group.

If it is replaced by a laser communication device, not only the antenna on the satellite can be made very small, but also the terminal antenna on the ground can also be made smaller, and the power consumption can also be greatly reduced.

At present, the space laser communication technology at home and abroad is almost the same, and Huaxing Technology Group is much ahead in terms of technology.

Later, Yang Jie also came to the development department of modem module and electronic module, and when he was in the development department of modulation machine module, the technical department also showed Yang Jie the optical chip designed by the technical department.

Huaxing Technology Group Co., Ltd. acquired John Bull's domestic integrated optoelectronic device company very early, and established an optoelectronics R&D center, with the world's leading optoelectronics research laboratory, and also set up a R&D center in China, and also established a production line of optical chips in China, and has now been able to prepare high-end lasers, detectors and modulator chips at 40G rate.

At the technical level, it is already more advanced than the domestic optical chip manufacturers of Eagle Sauce, and now Huaxing Technology Group is developing optical chips with a 100G rate.

The previous optoelectronic modulation modem was very large because the laser, modulator, coupler, wavelength division multiplexer, detector, etc. were all separated.

The optoelectronic chip is to integrate these together, this processing process is more difficult than the silicon chip, and when you want to manufacture an optical integrated chip, the optical device is embedded in the chip, and the electrical performance of the chip can be kept unchanged, which can be said to be very difficult.

If the manufacturer does not have technical accumulation in optical devices and semiconductor manufacturing process, it will not be possible, and even if it is made, the performance and yield of optical chips are very difficult to control.

Huaxing Technology Group Co., Ltd. built an optical chip production line, which is also a group of top engineers dedicated to the research and development of the optical chip manufacturing process, last year in the optoelectronic chip finally achieved mass production, and announced the world's first microprocessor with photonic data transmission capabilities, and now this photoelectric chip has begun to be used in many communication base stations, transmission systems, access network equipment.

Huaxing Technology Group Co., Ltd. has invested at least more than 20 billion R&D funds in optoelectronic chips over the years, but the manufacturing cost of optoelectronic chips itself is much cheaper than traditional photoelectric modulator equipment, which has also greatly improved the competitiveness of Huaxing Technology Group Co., Ltd. in communication equipment products.