Why the prices of optical transceivers differ a lot?

There are always saying that “your price is too high!” Indeed, there are some extremely-low-price optical transceivers in the market. The key is on the laser and receiver components. Those low-price optical transceivers usually adopt second-hand components or new but disqualified components that scrapped by some quality-concerned manufacturers. Here we discuss the problems of new but disqualified compoents.

The problem of disqualified lasers is mainly reflected in the high threshold value. Usually, the threshold value of the qualified laser is about 10mA. When the threshold value exceeds 15mA, the linearity and the lifetime of the laser will be greatly or even fatally affected. The reasons for the high laser threshold value mainly come from several aspects:

  •  The defects generated in the growth process of the elementary crystal,
  •  The weak electrostatic breakdown in the process of cutting and testing of the elementary crystal,
  •  The weak electrostatic breakdown in the production process of the transceivers.

The problems of disqualified receiver mainly are reflected in three factors: low sensitivity, weak electrostatic breakdown, and the poor internal seal of the housing. Now in the market most disqualified receivers come from the latter two factors. The consequent harm is the failure of receivers caused by the weak current and voltage shock, and unguaranteed lifespan of receivers.

To manufacture optical transceivers with guaranteed lifespan, stable and reliable performance in most environment and long term, the selection of qualified lasers and receiving devices is a prerequisite. There are times or even dozen of times in price gap between qualified and disqualified components.

In business, it is a universe principle that you get what you pay for.