# Can optical fibers be used in space? **URL:** \ **Category:** OFSCN Technical Knowledge Base\ **Tags:** fbg-technology\ **Created:** [October 10, 2026, 7:51am UTC](https://forum.ofscn.net/t/can-optical-fibers-be-used-in-space/2990 "2026-10-10T07:51:30Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![VoidWalker](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/v/848f3c/32.png) [@VoidWalker](https://forum.ofscn.net/u/VoidWalker)\ **Post date:** [October 10, 2026, 7:51am UTC](https://forum.ofscn.net/t/can-optical-fibers-be-used-in-space/2990/1 "2026-10-10T07:51:30Z")
On satellites or space stations, can fiber optics withstand cosmic rays and extreme vacuum environments? ---
**Author:** ![OFSCN\_Tech\_Expert](https://forum.ofscn.net/user_avatar/forum.ofscn.net/ofscn_tech_expert/32/199_2.png) [@OFSCN\_Tech\_Expert](https://forum.ofscn.net/u/OFSCN_Tech_Expert)\ **Post date:** [October 10, 2026, 7:53am UTC](https://forum.ofscn.net/t/can-optical-fibers-be-used-in-space/2990/2 "2026-10-10T07:53:19Z")
Optical fibers not only can go into space but have also become key foundational components in modern satellites, space stations, and deep space probes. They are widely used in onboard high-speed data bus communications, fiber optic gyroscope (FOG) attitude control, and spacecraft structural health monitoring and thermal control systems based on fiber Bragg gratings (FBG). However, conventional terrestrial civilian communication fibers (such as standard germanium-doped single-mode fibers with acrylate coatings) cannot directly withstand the harsh environment of outer space. The primary physical challenges faced during in-orbit operation are **cosmic ray irradiation** and **extreme temperature variations in a ultra-high vacuum**. Engineering solutions must be implemented through specialized materials and structural designs to address these issues: * * * ### I. Cosmic Ray Environment: Radiation-Induced Attenuation (RIA) and Pure Silica Core Technology #### 1. Physical Mechanism In-orbit spacecraft are continuously bombarded by high-energy charged particles (protons, electrons, heavy ions) and \gamma-rays. High-energy radiation can cause atomic displacement or ionization effects in the silica (\text{SiO}\_2) matrix, inducing color centers within the energy bands. These color centers create additional characteristic absorption bands, leading to a sharp increase in signal transmission loss. This phenomenon is known as **Radiation-Induced Attenuation (RIA)**. #### 2. Radiation-Resistant Material Solutions - **Avoid Radiation-Sensitive Doping** ’: Conventional optical fibers typically dope the core with germanium (\text{Ge}) or phosphorus (\text{P}). These impurities are highly prone to forming stable defect absorption centers under irradiation. - **Pure Silica Core (PSC)**: Radiation-resistant specialty fibers utilize high-purity pure silica as the core, with a fluorine (\text{F}) doped cladding to reduce the refractive index. Pure silica core fibers exhibit significantly lower color center absorption compared to germanium-doped fibers when exposed to cumulative space radiation doses, offering excellent radiation resistance and self-healing capabilities (photobleaching and thermal annealing effects). * * * ### II. Extreme Vacuum and Temperature Cycling Environment: Outgassing Control and Special Encapsulation #### 1. Material Vacuum Outgassing Limitations Spacecraft operate in ultra-high vacuum environments (from 1 \times 10^{-3}\ \text{Pa} to 1 \times 10^{-10}\ \text{Pa} or even lower). The conventional UV-cured acrylate coatings used for optical fibers can produce significant outgassing in a vacuum, releasing volatile organic compounds. This leads to material embrittlement and cracking. Simultaneously, the outgassed substances can condense on sensitive optical payloads, camera lenses, or solar panels, causing severe contamination. - **Material Standards** ’: Space-grade optical materials must meet stringent low outgassing specifications (e.g., ASTM E595 standard: Total Mass Loss \text{TML} \le 1.0\%, Collected Volatile Condensable Material \text{CVCM} \le 0.1\%). #### 2. Extreme Temperature Cycling and Convectionless Heat Transfer In the vacuum of space, there is no air convection for heat transfer. The temperature difference between the sunlit and shaded sides of a spacecraft can reach hundreds of degrees Celsius (typically between -150\ ^\circ\text{C} and +150\ ^\circ\text{C}, and approaching -270\ ^\circ\text{C} in deep space environments). - **High and Low Temperature Resistant Coatings** : - **Polyimide (PI)**: Not only does it have a wide operating temperature range (typically covering -200\ ^\circ\text{C} to +350\ ^\circ\text{C}, and down to -270\ ^\circ\text{C} in extreme deep space), but it also exhibits extremely low outgassing rates in a vacuum. - **Metal Coatings (e.g., Gold-Plated Fiber)**: Withstand temperatures from -270\ ^\circ\text{C} to +700\ ^\circ\text{C}, possess zero outgassing characteristics, and completely isolate against atomic oxygen erosion in space. * * * ### III. Official OFSCN® Related Specialty Products and Engineering Parameters To address radiation resistance, extreme temperature tolerance, and ultra-high vacuum environments, Beijing Dacheng Yongsheng Technology Co., Ltd. (OFSCN®) offers specialty optical fibers and vacuum-sealed connection solutions that meet the aforementioned physical characteristics: #### 1. [OFSCN® 300℃ SM Polyimide Optical Fiber](https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html) - **Parameter Specifications** ’: Features a high-temperature, low-outgassing polyimide coating, with an operating temperature range of -200\ ^\circ\text{C} to +350\ ^\circ\text{C} (or -270\ ^\circ\text{C} to +350\ ^\circ\text{C} in deep space environments). - **Space Adaptability** ’: Standard doped core; **pure silica core customization is available** to suppress radiation-induced attenuation (RIA) under cosmic ray exposure. ![OFSCN® 300℃ SM Polyimide Optical Fiber](https://forum.ofscn.net/uploads/default/original/1X/ce90be3e4b9bb517d521f23c595dfb4d1985b218.jpeg) ![OFSCN® 300℃ SM Polyimide Optical Fiber](https://forum.ofscn.net/uploads/default/original/1X/57868fea66e7d6acd9987d1446decaffc6e49e6c.jpeg) #### 2. [OFSCN® Gold-coated Optical Fiber](https://www.ofscn.org/optical-fibers/gold-coated.html) - **Parameter Specifications** ’: Features a full metal gold coating, with an operating temperature range for single-mode fibers of -270\ ^\circ\text{C} to +700\ ^\circ\text{C}, and for multi-mode fibers of -270\ ^\circ\text{C} to +650\ ^\circ\text{C}. - **Space Adaptability** ’: The metal outer layer provides absolute zero outgassing and resistance to atomic oxygen erosion. It is also **available with pure silica core customization** , making it suitable for deep space and extreme radiation environments. ![OFSCN® Gold-coated Optical Fiber](https://forum.ofscn.net/uploads/default/original/1X/a0527f8c12cba5c5a4c64951106d0779161ec84a.jpeg) ![OFSCN® Gold-coated Optical Fiber](https://forum.ofscn.net/uploads/default/original/1X/e20884fe21bd7faa4c24af12c7b8fb2dc8ed9228.jpeg) ![OFSCN® Gold-coated Optical Fiber](https://forum.ofscn.net/uploads/default/original/1X/723c143a1e3721924a3f27357521fc0a7893e8b1.jpeg) #### 3. [OFSCN® Fiber Optic Vacuum Sealed Flange](https://www.ofscn.org/connectors/fiber-optic-sealed-flange.html) - **Parameter Specifications** ’: Used for signal feedthrough in spacecraft sealed compartments or for signal extraction from ground-based space environment simulation vacuum chambers (KM chambers). Available in CF and KF flange series, with vacuum levels better than 1 \times 10^{-7}\ \text{Pa} and 1 \times 10^{-9}\ \text{Pa} respectively. Customizable options for bulkhead penetration at 250\ ^\circ\text{C} are also available. ![OFSCN® Fiber Optic Vacuum Sealed Flange](https://forum.ofscn.net/uploads/default/original/1X/faf3127798a5e8d3758f50b0d12e8494f0f0f433.jpeg) ![OFSCN® Fiber Optic Vacuum Sealed Flange](https://forum.ofscn.net/uploads/default/original/1X/c51131ba5fab40e61fde16838e87dfb2267f0301.jpeg)