|Item #|| INT-MSI-1300 || INT-MSI-1300B|
|Interferometer Wavelength Range||1250 - 1350 nm|
|Insertion Loss* |
from 1300 nm IN to Sample Arm
and to Reference Arm
|<4.2 dB (Typical) |
5 dB (Max)
|Insertion Loss* |
from 660 nm IN to Probe
|<3 dB (Typical) |
4.5 dB (Max)
|Path Length Difference||<0.1 mm (Typical) |
0.2 mm (Max)
|Detector Wavelegnth Range|| 800 - 1700 nm|
|Typical Responsivity (Max)||1.0 A/W|
|Output Bandwidth (3 dB)||DC - 15 MHz||DC - 100 MHz|
|Transimpedance Gain**||51 kV/A||100 kV/A|
|Saturation Power||70 µW||35 µW|
|Maximum Input Power||250 mW|
|DC Offset||<±5 mV|
|Power Supply||±12 V, 200 mA |
(PICO M8 con.)
|Size||4.72" x 3.15" x 0.827"|
(120 mm x 80 mm x 21 mm)
*Includes connector losses of the input and output pigtail,
measured at the central wavelength.
**Transimpedance gain measured with respect to the output power
using a high impedance load, half value with a 50 Ω impedance.
- Minimal Variation in Polarization Dependent
Coupling Ratio (PDCR)
- Integrated Balanced Signal Detection
with Active Aliasing
- Input for Aiming Beam (660 nm) to Aid in Alignment
- Interferometer Power Supply Included
The Michelson-type INT-MSI-1300 and INT-MSI-1300B interferometer subassemblies are designed to be used inside an OCT system with a balanced detection scheme for a wavelength range of 1250 to 1350 nm. For usage with faster sweeping lasers the bandwith of the integrated detectors of the INT-MSI-1300B has been increased up to 100 MHz. Each module contains a fiber coupler network for a Michelson interferometer with outputs for the reference arm and the sample arm. The INT-MSI-1300 and INT-MSI-1300B only differ in the above mentioned bandwidth, the transimpedance gain, and their saturation power, see table on the right.
Internally used couplers are optimized for flat wavelength response and very low polarization dependent coupling losses. The fiber length is matched on both arms of the interferometer to within 0.2 mm while the housing includes FC/APC angled fiber adapters for robustness and ease of use. To suppress the generation of aliasing frequencies in the digitized fringe signals, which degrade the image quality, the integrated, high-gain balanced detector includes an active aliasing filter.
To support aligning the INT-MSI-1300 and INT-MSI-1300B into optical systems, an additional input for a 660 nm aiming laser and a specially designed WDM-coupler that combines the swept laser source (1300 nm) and the alignment laser (660 nm) were included in the subassembly.