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last_updated: "2026-07-30T09:10:57.047-05:00"
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# Newport / New Focus 1801-FS Si Detector 125-MHz Photoreceiver (AC Coupled)

_Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._

## Summary

- Manufacturer: New Focus
- Model: 1801-FS
- Condition: Used and in Excellent Condition
- Price: Quote only
- Availability: Not in Stock
- Warranty: 1-Year Warranty with 30-Day Return Guarantee
- ITAR restricted: No
- Shipping weight: 2 lb
- Shipping dimensions: 12X9X6 in

## Categories

- Test Equipment > Electrical Test > Electrical-to-Optical (primary)

## Details

Power Supply and Cable sold separately.

### Configuration

- Coupling: AC Coupled Version
- Fiber Type: N/A
- Wavelength Range: 300-1000 nm
- Optical Input Connector Type: Freespace (FS)
- Detector: Si/PIN
- 3-dB Bandwith: DC-125 MHz (typical)
- Electrical Output Connector: SMA

View Photo of microtech connector.

## Images

- <https://www.artisantg.com/itemimages/new_focus_1801_fs_view1.jpg>
- <https://www.artisantg.com/itemimages/new_focus_1801_fs_view2.jpg>
- <https://www.artisantg.com/itemimages/new_focus_1801_fs_view3.jpg>
- <https://www.artisantg.com/itemimages/new_focus_1801_fs_view4.jpg>