Luna FFP-TF Fiber Fabry-Perot Tunable Filter

All-fiber, lensless Fabry-Perot tunable filter for 1520–1620 nm, with finesse from 100 to 6000 and a tuning rate of 2,500 Hz per FSR.

Operating wavelength range: 1520 - 1620 nm
Free spectral range: 15 - 27.5 THz
Finesse: 100 - 6000
Polarization dependent loss: <0.2 dB

Datasheet

Overview

The Luna FFP-TF is a Fiber Fabry-Perot (FFP) tunable filter. It is built around an all-fiber Fabry-Perot super-cavity, is based on Luna's patented FFP technology, and is designed for high finesse and low loss in a rugged package.

The filter has no lenses. Because there are no collimating optics, it avoids problems found in other Fabry-Perot component technologies, such as misalignment, sensitivity to the environment and extraneous modes.

The filter's response follows the Airy function, so its behavior stays very close to the theoretical model. This lets engineers design it into OEM systems with predictable results. The FFP-TF is the smaller and faster-tuning member of the FFP-TF/FFP-TF2 family. Standard configurations range from finesse 100 to 6000, and custom wavelength bands, free spectral ranges, finesse values and bandwidths are available for specialized applications.

Key Features

All-fiber platform
High resolution and low loss design
Super-cavity finesse
Vibration and shock resistant
Thermally stable
Fast scanning and large dynamic range permits fast, accurate measurements
Ideal for OEM applications
Small footprint
Low power requirements
Telcordia GR 2883 qualified
Proven reliability over decades of use
Customizable wavelength, free spectral range, finesse and bandwidth

Specifications

Optical Properties

Operating wavelength range	1520 - 1620 nm Standard specifications are fixed configurations
Free spectral range	15 - 27.5 THz FSRs are fixed but customizable within these ranges
Finesse	100 - 6000 Standard configurations: 100, 500, 650, 1000, 2000, 6000
Polarization dependent loss	<0.2 dB All standard configurations

Optical Properties – Finesse 100

Free spectral range	15 THz (120 nm) - 27.5 THz (220 nm) FSRs are fixed but customizable within these ranges
Bandwidth (FWHM or 3dB)	150 GHz (1200 pm) - 275 GHz (2200 pm) Bandwidth tolerances are typically +/-20%
Insertion loss	< 2.5 dB
Input power	310 mW

Optical Properties – Finesse 500

Free spectral range	15 THz (120 nm) - 27.5 THz (220 nm) FSRs are fixed but customizable within these ranges
Bandwidth (FWHM or 3dB)	30 GHz (240 pm) - 55 GHz (440 pm) Bandwidth tolerances are typically +/-20%
Insertion loss	< 2.5 dB
Input power	50 mW

Optical Properties – Finesse 650

Free spectral range	15 THz (120 nm) - 27.5 THz (220 nm) FSRs are fixed but customizable within these ranges
Bandwidth (FWHM or 3dB)	23 GHz (185 pm) - 42 GHz (338 pm) Bandwidth tolerances are typically +/-20%
Insertion loss	< 2.5 dB
Input power	48 mW

Optical Properties – Finesse 1000

Free spectral range	15 THz (120 nm) - 27.5 THz (220 nm) FSRs are fixed but customizable within these ranges
Bandwidth (FWHM or 3dB)	15 GHz (120 pm) - 27.5 GHz (220 pm) Bandwidth tolerances are typically +/-20%
Insertion loss	< 3.0 dB
Input power	30 mW

Optical Properties – Finesse 2000

Free spectral range	15 THz (120 nm) - 27.5 THz (220 nm) FSRs are fixed but customizable within these ranges
Bandwidth (FWHM or 3dB)	7.5 GHz (60 pm) - 13.8 GHz (110 pm) Bandwidth tolerances are typically +/-20%
Insertion loss	< 3.0 dB
Input power	15 mW

Optical Properties – Finesse 6000

Free spectral range	27.5 THz (220 nm)
Bandwidth (FWHM or 3dB)	4.6 GHz (37 pm) Bandwidth tolerances are typically +/-20%
Insertion loss	< 3.0 dB
Input power	5 mW

Electrical Properties

Tuning voltages/FSR FFP-TF	< 12 V
Tuning rate/FSR FFP-TF	2,500 Hz Tuning rate/FSR are recommended maximums
Capacitance FFP-TF	< 3 μF
Tuning voltage, maximum FFP-TF	70 V

Mechanical Properties

Dimensions FFP-TF	12.7 mm x 14.3 mm x 57.2 mm
Weight FFP-TF	28 g
Mounting holes FFP-TF	(4) #1-72 UNF x 0.16” deep
Cable jacket FFP-TF	900 μm loose buffer tubing
Cable length FFP-TF	~ 1 m

Environmental Properties

Operating temperature FFP-TF	-20 to 80 °C Complies to Telcordia GR 2883
Change in voltage FFP-TF	< 19 V Locking voltage verified over -20 to 80 °C range. Voltage neither specified nor tested for bandwidth less than 2 GHz.

Custom and OEM Options

Wavelength bands	from 800 to 2000 nm Contact Luna for configuration details
Free spectral range	100 to 40,000 GHz
Finesse	up to 16,000
Bandwidth	from MHz to GHz

Ordering

Part number format FFP-TF	FFP-TF-wwww-wwww-bbbu-fffff-ii-ccc wwww: operating wavelength range (e.g. 1520 - 1620); bbb: bandwidth (e.g. 015 = 15 GHz); u: bandwidth unit (G = GHz, M = MHz); fffff: finesse (e.g. 01000); ii: insertion loss (e.g. 2.5 dB); ccc: connector

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.