Luna FFP-TF and FFP-TF2 Fabry-Perot tunable fiber filters

Luna / Series · Optical Modules and Components

Luna FFP-TF & FFP-TF2 Tunable Fiber Fabry-Perot Filters

All-fiber, lensless Fabry-Perot tunable filters with finesse from 100 to 6000 over the 1520 - 1620 nm operating wavelength range.

Operating wavelength range: 1520 - 1620 nm
Free spectral range (finesse 100, 500, 650, 1000, 2000): 15 THz (120 nm) – 27.5 THz (220 nm)
Free spectral range (finesse 6000): 27.5 THz (220 nm)
Finesse: 100, 500, 650, 1000, 2000, 6000

View Models Datasheet

Overview

The FFP-TF and FFP-TF2 are tunable filters from Luna Innovations based on a patented Fiber Fabry-Perot (FFP) design. Each consists of an all-fiber Fabry-Perot super-cavity in a fast-tuning package, combining high finesse with low insertion loss.

The filter uses a lensless all-fiber construction with no collimating optics or lenses. This avoids problems found in other Fabry-Perot component technologies, such as misalignment, environmental sensitivity and extraneous modes.

The filter response follows the Airy function, so system designers can integrate it into OEM systems and expect results very close to the theoretical model.

The FFP-TF2 design improves etalon alignment for long-term stability and reliability, and is Telcordia-qualified. Several standard configurations are available, and custom multi-band configurations can be supplied for specialized applications.

Models in this series

Model	Description
FFP-TF	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.	Details →
FFP-TF2	Luna FFP-TF2 Tunable Fiber Fabry-Perot Filter Telcordia-qualified all-fiber Fabry-Perot tunable filter with improved etalon alignment, operating from 1520 to 1620 nm with finesse up to 6000.	Details →

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 for fast, accurate measurements
Suited to 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 (finesse 100, 500, 650, 1000, 2000)	15 THz (120 nm) – 27.5 THz (220 nm) FSRs are fixed but customizable within these ranges
Free spectral range (finesse 6000)	27.5 THz (220 nm) FSRs are fixed but customizable within these ranges
Finesse	100, 500, 650, 1000, 2000, 6000 Standard configurations
Bandwidth (FWHM or 3dB), finesse 100	150 GHz (1200 pm) – 275 GHz (2200 pm) Bandwidth tolerances are typically +/-20%
Bandwidth (FWHM or 3dB), finesse 500	30 GHz (240 pm) – 55 GHz (440 pm) Bandwidth tolerances are typically +/-20%
Bandwidth (FWHM or 3dB), finesse 650	23 GHz (185 pm) – 42 GHz (338 pm) Bandwidth tolerances are typically +/-20%
Bandwidth (FWHM or 3dB), finesse 1000	15 GHz (120 pm) – 27.5 GHz (220 pm) Bandwidth tolerances are typically +/-20%
Bandwidth (FWHM or 3dB), finesse 2000	7.5 GHz (60 pm) – 13.8 GHz (110 pm) Bandwidth tolerances are typically +/-20%
Bandwidth (FWHM or 3dB), finesse 6000	4.6 GHz (37 pm) Bandwidth tolerances are typically +/-20%
Insertion loss (finesse 100, 500, 650)	< 2.5 dB
Insertion loss (finesse 1000, 2000, 6000)	< 3.0 dB
Polarization dependent loss	<0.2 dB All standard configurations
Input power (finesse 100 / 500 / 650 / 1000 / 2000 / 6000)	310 mW / 50 mW / 48 mW / 30 mW / 15 mW / 5 mW

Electrical Properties

Tuning voltages/FSR FFP-TF	< 12 V
Tuning voltages/FSR FFP-TF2	< 18 V
Tuning rate/FSR FFP-TF	2,500 Hz Recommended maximum
Tuning rate/FSR FFP-TF2	800 Hz Recommended maximum
Capacitance	< 3 μF
Tuning voltage, maximum	70 V

Mechanical Properties

Dimensions FFP-TF	12.7 mm x 14.3 mm x 57.2 mm
Dimensions FFP-TF2	13.5 mm x 25.8 mm x 57.2 mm
Weight FFP-TF	28 g
Weight FFP-TF2	53 g
Mounting holes	(4) #1-72 UNF x 0.16” deep
Cable jacket	900 μm loose buffer tubing
Cable length	~ 1 m

Environmental Properties

Operating temperature	-20 to 80 °C Complies to Telecordia GR 2883
Change in voltage	< 19 V Locking voltage verified over -20 to 80 °C range; 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); ccc connector
Part number format FFP-TF2	FFP-TF2-wwww-wwww-bbbu-fffff-ii-ccc Same field coding as FFP-TF