According to a research report from Guotai Haitong Securities Co., Ltd. (601211), inter-satellite laser communication is a highly certain investment track in the commercial aerospace sector and has now moved into the networking application stage. Optical communication can leverage the ground-based industry chain, and the ATP system is the core critical element. The competitive landscape can be divided into three categories: research institutes, start-ups, and listed companies. Future industry catalysts include: large-scale bidding for low-orbit satellite internet constellations; implementation of 15th Five-Year Plan policies; and breakthroughs in high-speed coherent technologies along with successful in-orbit verification.
Inter-satellite laser communication is becoming the mainstream networking solution for low-orbit constellations
Inter-satellite laser communication uses laser as a carrier to achieve high-speed data transmission between satellites. Since individual low-orbit satellites have limited ground coverage and global deployment of ground stations is constrained, inter-satellite links are an important support for the commercial networking of low-orbit constellations. With advantages such as large bandwidth, small size, low power consumption, anti-interference, and no spectrum regulation, inter-satellite laser communication has become a rigid necessity for the commercial deployment of low-orbit constellations. "Inter-satellite laser plus satellite-to-ground microwave" has become the preferred networking architecture for current low-orbit satellite internet constellations. China's GW, Qianfan, Honghu and other constellations are massive in scale, and the cumulative market space for inter-satellite laser communication could reach the hundred-billion level. In the long term, combined with networking demand from remote sensing satellites and space-based computing constellations, the track's ceiling is expected to rise further.
The ATP system is the core critical link in inter-satellite laser communication
Inter-satellite laser communication terminals are mainly composed of two major modules: the communication transceiver system and the ATP system. 1) The communication transceiver system handles laser generation, signal modulation, optical power amplification, photodetection, and signal demodulation. Core components include narrow-linewidth lasers (DBF/EML), optical modulators (MZM/EAM), erbium-doped fiber amplifiers (EDFA), detectors (PIN/APD), and communication baseband (DSP). The mainstream technology system shares the same origin as ground-based fiber optic communication, and can be migrated based on the mature optical device industry chain, providing a solid industrialization foundation. 2) The core task of the ATP system (acquisition, pointing, and tracking system) is to establish and maintain laser communication links between high-speed moving satellite platforms, achieving micro-radian-level precise beam alignment and stable tracking. Core components include the CPA coarse pointing assembly (servo turntable), FPA fine pointing assembly (FSM fast steering mirror), optical antenna (telescope), tracking detector (CMOS/QD), and electronic control (FPGA/DSP). This system is the core technical barrier for taking optical communication into space, and accounts for a relatively high proportion of the terminal's overall value.
The competitive landscape can be divided into three categories: research institutes, start-ups, and listed companies
1) Research institute players include the 504th Institute of the Fifth Academy of CASC/Hangzhou Dongfanghong Laser Communication, the 704th Institute of the Ninth Academy of CASC/Aerospace Electronics, Shanghai Institute of Optics and Fine Mechanics/Shangguang Communication, Xi'an Institute of Optics and Fine Mechanics/Zhongke Tianta, and others. They possess deep technical accumulation, outstanding engineering and in-orbit verification capabilities, and have formed a mature supporting system in national-level large constellation projects such as the Xingwang project. 2) Start-ups include Aurora Starlink, Blue Star Domain, Helium Starlink, Yingtian Optics, and others, which are developing rapidly in high-speed coherent technology R&D and industrialization cost reduction. 3) Ground-based optical communication listed companies such as Fiberhome Telecommunication Technologies Co., Ltd. (600498) rely on the mature ground optical communication industry chain to promote the migration of chips, devices, modules, and even terminal products to spaceborne scenarios, with outstanding scale advantages. The bank believes that during the 15th Five-Year Plan period, as the construction of low-orbit satellite internet constellations accelerates, the inter-satellite laser communication industry is expected to scale up. It is recommended to focus on leading terminal manufacturers with self-developed ATP system capabilities and leading ground optical communication companies with the ability to migrate aerospace-grade optical communication technology. Recommended target: Aerospace Electronics; Target to watch: Fiberhome Telecommunication Technologies. Risks: Constellation construction pace falling short of expectations; technology iteration and in-orbit verification falling short of expectations; intensifying market competition; and commercialization of low-orbit constellations falling short of expectations.
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