Description: The OTF-920 tunable bandpass filter achieves exceptional optical performance, while offering flexibility and ease of use. Utilizing multilayer dielectric interference filters, the OTF-920 features Santec's patented "linear sliding" tuning method. This unique tuning method allows the unit to cover a wide spectral range while maintaining onstant optical properties including bandwidth, insertion loss, and PDL.
The tuning range on this machine is 1527 to 1571 nm and it has the APC option and the ATT option installed.
This machine is suited for the following scenarios:
Wavelength and power control using one filter and one attenuator
Slider 1: Filter with bandwidth 1.2 nm, Tuning range 1530 - 1570 nm
Slider 2: Attenuator, variable between 0 - 30 dB
The two optical components are automatically adjusted to provide the requested wavelength and attenuation level. If desired, either the OBPF or the attenuator can be disabled (translated out of the optical path). The OTF-920 can be set to Automatic Power Control (APC) mode, which adjusts the attenuation to maintain a constant output power level.
The OTF-920 can also be configured as a tunable incoherent light source by coupling it with a broadband light source. While the output power of this configuration is relatively low (-30 to -20 dBm), a tunable incoherent source is especially useful for applications in which coherent resonance effects or nonlinear interference effects are non-negligible.
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