Femto have launched the updated HSA-X series. The series has been redesigned due to some of the key components in these amplifiers being discontinued. The updated series shows improved performance and ensures a long period of availability.
Amplifier HSA-X-2-40:
In the updated version of the model HSA-X-2-40 (2 GHz bandwidth, 40 dB gain) a different internal topology has been used in order to maintain and improve key characteristics. As a result this amplifier is inverting (i.e. a positive input voltage will show up as a negative voltage at the output). In order to indicate this important characteristic a new type designation HSA-X-I-2-40 has been given.
In most applications, the phase relationship (inverting/non-inverting) is of minor importance. If however some sort of heterodyning is used in an experiment or system, this property can be very important and require e.g. a software fix to restore the functionality.
Some OEM customers have built systems using the HSA-X-2-40 or photoreceivers HSA-X-S. In order to give these customers time to integrate the new inverting models in their system, Femto have stocked the discontinued components used in these models. Within an estimated scope of approximately 5 years the existing model HSA-X-2-40 (non-inverting) will be available unchanged.
In general using the new inverting HSA-X-I-2-40 is recommended. This particularly holds true for OEM customers who are in the development phase of a new system and who target a long product lifecycle.
Photoreceiver Series HSPR-I:
The photoreceiver series HSA-X-S is based upon the amplifier HSA-X-2-40. For the same reasons as for the amplifiers, the photoreceivers will also be offered in two versions. The new series is called HSPR-X-I.
Naming Convention:
| HSPR | High Speed Photoreceiver. This acronym replaces “HSA-X-S” which did not refer to photoreceivers. |
| X | Differentiation to the HSA-Y series |
| I | Inverting (positive input voltage - negative output voltage) |
| 1G4 or 2G | Bandwidth 1.4 GHz respectively min. 2 GHz |
| SI or IN | Si respectively InGaAs photodiode |
| FC | Optical connector: Fibre Connector |
| FS | Optical connector: Free Space |
| Previous Model | New Model | Characteristics of the New Model |
|---|---|---|
| HSA-X2-40 | HSA-X-I-2-40 | - higher bandwidth |
| HSA-X-S-1G4-SI-FC | HSPR-X-I-1G4-SI-FC | - interting - better output matching coefficient S22 - smaller 1/f noise - lower broadband noise at the output Remark: Bandwidth is unchanged (limited by the photodiode) |
| HSA-X-S-1G4-SI-FS | HSPR-X-I-1G4-SI-FS | |
| HSA-X-S-2G-IN-FC | HSPR-X-I-2G-IN-FC | |
| HSA-X-S-2G-IN-FS | HSPR-X-I-2G-IN-FS |
