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Home > Products > Tunable Optical Filters > Tunable Edge Filters
Tunable Edge Filters  
Optoplex Tunable Edge Filter
Optoplex Tunable Edge Filter
  • Description
  • Features
  • Applications
  • Specification
  • Typical Performance
Product Description - Tunable Edge Filter

Tunable edge filter is a customized product. It usually belongs to 2-port optical tunable filter product platform. Instead of using narrow bandpass filter in the 2-port tunable optical filter, the tunable edge filter utilizes a low-pass or long-pass interference filter. By changing the incident angle of the light beam, the cut-off wavelength will be tuned. Standard Tunable edge filters support C-band or L-band wavelength range.

In other applications, Tunable edge filter can be in 3-port configuration, in which one output is long pass and the other one is low pass.

Reflection and transmission spectra of Optoplex tunable edge filter

Features and Benefits of Tunable Edge Filter
  • Athermal Design
  • Wide Tuning Range, Cover C-Band or L-Band
  • Low-Pass and Long-Pass Filters
  • Low & Uniform Insertion Loss
  • Latching and Low Power Consumption
  • Options of Electrical Connector from Side or Bottom
  • Support Both TTL and LVTTL
  • 3-Port Tunable Edge Filter Available
  • Telcordia GR-468 Qualified
Applications of Tunable Edge Filter
  • Dynamically reconfigure wavelength bands
  • Dynamically separate two wavelength bands
  • Obtaine a Bandwidth-Tunable Filter by cascading two tunable edge filters (Low-pass + High-pass)
Specifications of Tunable Edge Filter
Tuanble edge filter is a highly custom-designed product. It can be either 2-port. device or a 3-port module. Please talk to Optoplex Sales persons and discuss your applications. Please send your request to Sales@optoplex.com.


Typical Performance of Tunable Edge Filter

Reflection and transmission spectra of Optoplex tunable edge filter

Blue line: Transmission spectrum
Red line: Reflection spectrum

Parameter Definition of DPSK Demodulator

Parameter Definition


Wavelength Tuning Range (nm) is the spectral range over which a ROADM's center wavelength can be tuned and performance specification can be met..

1527.994 ~ 1563.047 nm

Wavelength Tuning Resolution (GHz) is the minimum tuning step of a tunable filter.

10 pm

Passband Width @ X-dB Down (GHz) is the full spectral width centered at the ITU grid measured at X-dB below the minimum insertion loss point. Usually, X = 0.5, 1, 3 and 20.

35 GHz @0.5-dB down for 100 GHz channel spacing

Peak Insertion Loss (dB) is power difference between the 0-dB level and the maximum power level measured within a given passband window.

2.5 dB

Polarization Dependent Loss (PDL) (dB) is the difference between the maximum and minimum insertion loss over all polarization states within a given passband window.

0.3 dB within CW ± 12 GHz

Polarization Mode Dispersion (PMD) (ps) is the maximum Differential Group Delay within a given passband width.

0.3 ps

Chromatic Dispersion (CD) (ps/nm) is the derivative of the Group Delay versus wavelength within a given passband width.

± 25 ps/nm within CW ± 12 GHz

Wavelength Setting Error (GHz) is the difference between a channel central wavelength (usually defined using 3-dB bandwidth) and the target wavelength (usually the ITU grid) during tuning.

± 4 GHz

Wavelength Repeatability (GHz) is the repeatability of a channel central wavelength (usually defined using 3-dB bandwidth) during repeated tuning.

± 1 GHz

Wavelength Temperature Dependence (pm/°C) is the rate of a channel central wavelength versus temperature.

± 1 pm/°C

Optical Return Loss (dB) is the ratio between the input power and the reflected power over all polarization states at each port , RL = -10×log10(Pr/Pin).

40 dB

Tuning Speed (s) is the time needed by a tunable filter to tune from one channel to another. It is dependent on the originating and destination channels. The longest time required is specified.

6 s

Operating Temperature (°C) is the ambient temperature range over which the device's performance spec can be met.

-5 to 65 °C

Storage Temperature (°C) is the ambient temperature range over which the device can be stored without affecting its intended application afterwards.

-40 to 85 °C

Product Request and Ordering Information
Please speak to Optoplex Sales persons. If you request custom-designed tunable edge filter product, please provide the following parameters:
  • Wavelength range
  • Tuning accuracy
  • Fiber length
  • Optical connector type