研究目的
Investigating the reliability of silica-based PLC optical splitters under temperature and humidity variations, focusing on insertion loss and polarization dependent loss changes.
研究成果
The research concludes that temperature significantly affects insertion loss in PLC optical splitters due to misalignment from thermal expansion coefficient mismatches, with maximum changes of 0.472 dB at 75°C and 0.486 dB at -40°C, while polarization dependent loss remains minimal. Packaging improvements, such as using adhesives with high glass transition temperature and moisture resistance, are recommended for enhanced reliability. The findings are applicable to other PLC-based devices.
研究不足
The study is limited to silica-based PLC optical splitters and specific temperature/humidity conditions; it does not address other environmental factors or long-term aging effects beyond 15 cycles. The finite element model is simplified and may not capture all complexities of real-world packaging.
1：Experimental Design and Method Selection:
The study combined requirements from GR-1209-CORE and GR-1221-CORE standards to design an online cyclic temperature and humidity reliability test. A finite element method (FEM) was used to simulate thermal effects on device performance.
2：Sample Selection and Data Sources:
18 samples were selected from a batch of PLC optical splitters produced by company A using LTPD sampling criterion. Data on insertion loss and polarization dependent loss were collected at 1550 nm wavelength during temperature and humidity cycling.
3：List of Experimental Equipment and Materials:
Temperature and humidity test chamber, optical power measurement equipment, PLC optical splitters, UV adhesives (UV epoxy A, B, C), fused silica fibers, quartz PLC chips, borosilicate glass fiber arrays.
4：Experimental Procedures and Operational Workflow:
The test involved 15 cycles from high temperature and high humidity (75 °C, 90% RH) to low temperature (-40 °C), with holding times of 10 hours at each extreme, temperature change rates of 1 °C/min, and data sampling every 10 minutes during ramps and every hour during holds. Optical performance was monitored online.
5：Data Analysis Methods:
Insertion loss and polarization dependent loss changes were analyzed, with failure defined as optical power loss change exceeding 0.5 dB. FEM simulation was used to model thermal stress, strain, and alignment deviations, with coupling efficiency calculated using specific formulas.
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