Ultra-Miniaturized Hybrid Devices for Erbium-Doped Fiber Amplifiers(EDFA)

With the wide application of EDFA(Erbium-Doped Fiber Amplifier) in ROADM, silicon photonics, and DCI high-speed connection, it has promoted the development of EDFA to become more miniaturized and integration. HYC has been engaged in the research and manufacture of optical passive devices for more than 20 years, always focusing on technology accumulation and innovation, with six core technical capabilities, and can provide customers with seven major solutions. 

In order to meet the needs of EDFA (Erbium-Doped Fiber Amplifier) applications, HYC has recently launched hybrid series product for the miniaturized EDFA. The product line includes 980/1550nm IWDM Hybrid (Isolator+WDM), GFF (Gain Flattening Filter), IGFF (Isolator + GFF), etc.
![1.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/467318/83d3104e-e9ea-1bfd-4a9c-56cb79d50abe.png)


Traditional EDFA system is mainly composed of erbium-doped fiber, pump source, isolator, combiner, coupler, TAP PD and control circuit. N in 1 hybrid device can combine isolator, WDM, GFF, TAP in one component but with the same functions. Now HYC can provides 980/1550 IWDM, 980/1550 Mini IWDM, TIWDM, IGFF, and OSC WDM etc., which are widely used in EDFA, light source equipment. 

The package size of the hybrid device is smaller. For example, IWDM integrates the functions of isolator and WDM, but the size is φ2.5*22mm (steel pipe), and the cost of module products is reduced by 30%.

Features:
1.Compact size, the size of Mini IWDM (steel pipe) is φ2.5*22mm
2.High stability, typical value of reflected IL ≤0.15dB, typical value of transmitted IL ≤0.3dB（-5~+75℃）
3.Meet with 168-hour experiment (tested at 120 ° C, 2 atmospheres, 100% humidity)
4.Fully meet the reliability requirements of Telcordia GR-1221-CORE
![002英文版(1).jpg](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/467318/fbcd1151-8cf8-13e2-72d3-f4b160b33fb8.jpeg)

Product example 1: 1x2 WDM and optical isolation hybrid device (IWDM)
The functional diagram of 1×2 WDM and isolator hybrid device is used for EDFAs with high isolation requirements, which can not only ensure the optical isolation requirements, but also reduce the size of the entire EDFA module.  The pump light can also be incident on the EDF (Erbium-doped fiber) from the fiber 2 to realize the optical amplification function.
![3.jpg](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/467318/0c2b7ae1-a21c-7e86-c4ca-dfda92745fd9.jpeg)


Product example 2: Optical isolation and gain flat filter (GFF) hybrid device
The integrated device not only decrease size of module, but also realize the function of isolation, and gain flat filter.
![4.jpg](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/467318/2e81f6db-8072-9039-5a37-109e74aa1bd9.jpeg)


HYC has five product lines: fiber connectivity, WDM, PLC splitters, high-speed transceiver optical subassembly, micro-optics device, and six technology platforms:
1. Optical design, simulation and ray tracing capability based on Zemax, Matlab and Mathcad;
2. Free space optics design, submicron alignment / coupling/assembly capabilities;
3. High precision mechanical design, mold and injection design & precision manufacturing capabilities;
4. High density parallel optics Design and manufacturing capabilities (such as FA fiber array &MPO and integration with isolators, etc.);
5. Optical substrate and wafer post-processing capabilities, and the corresponding capabilities for analyzing optical glass geometry and stress;
6. Automatic precision assembly and testing ability, software programming ability. 

HYC can also provides customers with seven solutions:
1. Parallel optics solutions to AOC/DCI
2. Multi-channel WDM optical engines for DCI
3. Passive optical solutions to coherent optics/Silica photonics 
4. Passive solutions used for EDFAs
5. DCI Connectivity Solutions
6. WDM Subsystem/system Solutions
7. FTTX/PON Solutions

https://www.hyc-system.com/Product/index_297