HTD dedicates to provide high quality products to our clients. Our connector testing items include but not limited to insertion loss, return loss, ferrule enface, 3D interference test and tensile value.

HTD strictly follows clients’ requirement in product manufacture. If clients have requirement in measuring parameters, we will double check with clients in advance anfd manufacture products according to clients’request.

Insertion Loss & Return Loss Test

In telecommunications, insertion loss (IL) refers to the loss of signal power, calculated as a ratio in dB (decibel), resulting from inserting a device in a transmission line or optical fiber. It can also be referred to as attenuation, which indicates how much the signal loss is by comparing the input power to the output power.

A lower insertion loss value indicates a better insertion loss performance. For example, an insertion loss of 0.3dB is better than 0.5dB.

Return loss (RL) refers to the loss of reflected signal power. Therefore, the higher the return loss is, the lower the amount of reflection will be. Which means the fiber connector will have better performance with a higher value of RL.

HTD's connector is 100% tested with insertion loss and return loss before package. IL and RL data will be recorded on each patch cord's label.

3D Interference Test

3D interference test ensures that fiber optic connector end face's performance parameter is within IEC international standard range. The geometry of the end face/tip of fiber optic termini is a key factor for controlling the performance of the Fiber Optic connector. This geometry will determine which areas come into contact when two Fiber Optic connectors or termini are mated.

Measuring end face parameters such as the radius of curvature, the apex offset, and the fiber height during the polishing process provides both quality control and quality assurance. HTD's PC/UPC connector has over 90% 3D interference test passing rate. APC connector has over 85% passing rate. Below chart is for 3D inference test parameter reference.

Visual End Face Inspection

Polished connector ferrules require visual inspection to find possible defects. This is accomplished by microscope machine which has a stage modified to hold the connector in the field of view. Fiber Optic Inspection Microscopes vary in magnification from 30 to 400 power, with 30-100 power being the most widely used range. Connectors are viewed end-on or at a small angle to find polishing defects such as scratches.

Class A Class B

Class A end face is the best quality level without any scratch. Class B end face is allowable for several scratches within certain micrometer (μm). HTD usually produce class A connector. However, if client requests class B connector with lower price, we can accept and produce as client wants.

Class A Standard

Class B Standard