报道了一种低损耗小型化高纯度高稳定性的光纤型空芯光子晶体光纤(HC-PCF)低压CO2气体腔。通过采用高压待充气体对HC-PCF进行气体置换、利用高压填充的HC-PCF进行尾纤耦合,确保了腔内填充气体的纯度;通过熔接单模光纤(SMF)作为输入端、经陶瓷插芯套管准直对接多模光纤(MMF)作为输出端,有效降低了插入损耗;通过对HC-PCF的实时监控降压与胶封,制备出压强低至10kPa的光纤型HC-PCF低压CO2气体腔。该HC-PCF低压腔的插入损耗约为3.5dB,且具有长期气密性与稳定性。这种HC-PCF低压气体腔在光纤气体传感、激光稳频、高分辨光谱等方面具有广泛应用前景。 Reported a low-loss miniaturized high-purity high-stability optical fiber hollow-core photonic crystal fiber (HC-PCF) low pressure CO2 gas chamber. HC-PCF is replaced by high-pressure gas to be inflated, and pigtails are coupled by HC-PCF filled with high pressure to ensure the purity of the gas filled in the cavity. The fused single-mode optical fiber (SMF) Core-tube alignment and docking multimode fiber (MMF) as the output end, effectively reducing the insertion loss; by HC-PCF real-time monitoring of step-down and rubber seal, prepared as low as 10kPa pressure fiber HC-PCF low pressure CO2 Gas chamber. The HC-PCF low-pressure cavity insertion loss of about 3.5dB, and with long-term air tightness and stability. The HC-PCF low-pressure gas chamber has wide application prospects in optical fiber gas sensing, laser frequency stabilization, high-resolution spectroscopy and the like.