Innovation since 1979
Tunable Filters
Our Tunable Filters can be used in a wide range of applications from R & D to production. We have both Gaussian, using dielectric multilayer coatings, and Flat-Top, using gratings, filter profiles available.
Tunable Filter Selection Guide
| Product Code | Product Image | Filter Profile | Filter Slope | Control | Wavelength | Bandwidth |
|---|---|---|---|---|---|---|
| OTF-980 |
 |
Flat-Top | 1000 dB/nm | Programmable Touch Screen |
C&L-band /85 nm | Tunable |
| OTF-350 |
 |
Flat-Top | 400 dB/nm | Manual | C&L-band /80 nm* O-band /40 nm |
Tunable |
| OTF-930 |
 |
Gaussian | - | Programmable | C&L-band /80 nm* O-band /80 nm |
Fixed/Select |
| OTF-320 |
 |
Gaussian | - | Manual | C&L-band /80 nm C-band /40 nm L-band /40 nm* O-band /40 nm |
Fixed/Select |
* Contact us for availability
Ultra-Steep Tunable Filter
OTF-980
Our flagship programmable bandwidth and wavelength Tunable Filter, loaded with options.- Center Wavelength and Bandwidth can be Tuned Independently
- Ultra-Steep Filter Slope 1000 dB/nm(typ.)
- Peak Search Function
- Wide Range of Control Interfaces, inc. Touchscreen
Our OTF-980 is built with novel free-space optics combined with an ultra-fine tuning mechanism to ensure precise filter control and a flat-top passband shape. An integrated power meter monitors power at the output and features an automatic peak search function. GPIB, Ethernet and USB interfaces combined with the industry-standard SCPI command set allows for full remote control and measurement automation. The OTF-980 is also controlled via the front panel touchscreen.
- Center wavelength and bandwidth can be tuned independently
- Flat-top filter shape with steep filter slope:
- Ultrafine-Plus: 0.05 to 3 nm, 1000 dB/nm
- Ultrafine: 0.08 to 4 nm, 500 dB/nm
- Standard: 0.1 to 15 nm, 200 dB/nm
Wavelength tuning range: 85 nm in C&L-band - Peak search function
- Touchscreen and GPIB/Ethernet/USB interfaces
- 100 Gb/s, 400 Gb/s transmission test
- Adjustable and adaptive DWDM, OFDM channel filtering
- ASE noise filtering
- Next generation bundle wavelength OXC
|
Category
|
Parameter
|
Unit
|
Standard
|
Ultrafine
|
Ultrafine-Plus
|
|
| Wavelength Characteristics | Wavelength Range |
nm
|
1525 to 1610
|
|||
| Accuracy |
nm
|
± 0.05 (typ.± 0.03)
|
||||
| Repeatability *1 |
nm
|
± 0.01 (typ.± 0.005 *4)
|
||||
| Setting Resolution |
nm
|
0.001
|
||||
| Filter | Bandwidth @-3dB |
nm
|
0.1 to 15
|
0.08 to 4
|
0.05 to 3
|
|
| Accuracy |
nm
|
± 0.05 (typ.± 0.03)
|
||||
| Repeatability *1 |
nm
|
± 0.01
|
||||
| Setting Resolution |
nm
|
0.001
|
||||
| Filter Slope *2 (typ.) |
dB/nm
|
200
|
500
|
1000
|
||
| Power Characteristics | Maximum Input Power *3 |
dBm
|
+ 27
|
|||
| Insertion Loss | Bandwidth ≧ 0.2 nm |
dB
|
5 *5, 6 (typ. 3.5)
|
6 *5, 7 (typ. 5)
|
||
| Bandwidth < 0.2 nm |
dB
|
7 *5, 6 (typ. 5.5)
|
8 *5, 7 (typ. 7)
|
|||
| Crosstalk (typ.) |
dB
|
50
|
||||
| Polarization Dependent Loss (typ.) |
dB
|
0.2
|
||||
| Peak Search Function (Option) |
–
|
Yes
|
||||
| Interface | Communication |
–
|
GP-IB (IEEE488.2), USB & Ethernet
|
|||
| Display |
5.6 inch resistive touchscreen (res. 640×480)
|
|||||
| Optical Fiber |
SMF
|
|||||
| Optical Connector |
FC or SC
|
|||||
| Optical Polish |
SPC or APC (Angled PC)
|
|||||
| Environmental Conditions | Operating Temperature |
degC
|
15 to 35
|
|||
| Operating Humidity |
%
|
< 80
|
||||
| Power Supply | Voltage |
V
|
AC 100 to 240 ± 10 %
|
|||
| Frequency |
Hz
|
50 / 60
|
||||
| Power Consumption |
W
|
100
|
||||
| Others | Dimensions (W) x (D) x (H) |
mm
|
210 x 350 x 133
|
|||
| Weight |
kg
|
8.5
|
||||
*1: Temperature 25 ± 1 ℃
*2: Between - 3 and - 40 dB for Bandwidth@- 3 dB > 0.2 nm
*3: In case of peak search option, input power range is available from - 30 dBm to + 20 dBm.
*4: When using peak search function, the wavelength repeatability improves to ± 0.005 nm (typ.).
*5: In case of peak search option, the insertion loss increases by 0.5 dB
*6: The insertion loss at (1525 nm to 1530 nm) wavelength range may increase by 1 dB.
*7: The insertion loss at (1525 nm to 1530 nm) wavelength range may increase by 0.5 dB.
Gaussian shape Tunable Filter
OTF-930
Programmable thin-film dielectric coating based Tunable Filter- 80nm tuning range, 0.01 nm resolution
- Low PDL (< 0.1 dB) & PMD (< 0.1 ps)
- Peak Search Function
Our OTF-930 bench-top type tunable filter has wide variety of filter profile options available. Combining filter types and number of cascaded filters (S1, S2, S3) the OTF-930 can be configured to suit many fiber optic applications. Low PDL and low PMD are characteristic of Santec‘s “linear sliding” filters. OTF-930 comes with GPIB and RS-232C control interfaces that enable remote control and data acquisition.
- 80 nm tuning range
- Low insertion loss
- Low PDL ( < 0.1 dB) & PMD (< 0.1 ps) over whole tuning range
- 0.01 nm resolution
- Full GPIB support
Filter Selections
- 3 dB Bandwidth: 0.8 nm to 1.0 nm
*Below examples illustrate typical performance.
Filter type
= 08S1 or 12S2
08S1
- 3 dB Bandwidth 0.9 nm
- 10 dB Bandwidth 2.8 nm
- 20 dB Bandwidth
12S2
- 3 dB Bandwidth 0.9 nm
- 10 dB Bandwidth 2.0 nm
Chromatic Dispertion & Group Delay [12S2, 1550 nm]
Chromatic dispersion for each wavelength
- 1530 nm + 4.0 ps/nm - 4.5 ps/nm
- 1550 nm + 5.0 ps/nm - 5.0 ps/nm
- 1570 nm + 5.0 ps/nm - 5.0 ps/nm
- ASE Noise Suppression
When optical signals are amplified using EDFAs, unwanted levels of amplified spontaneous emission (ASE) can decrease the signal-to-noise ratio. The OTF-930 with 08-S1, 08-S2 or 12-S2 filters can remove the ASE noise with minimal loss. - Wavelength Channel Selection
The 03-S2 filter configuration is particularly suitable for selecting a single DWDM wavelength from a 100 GHz grid. Other filters can be used to select other ITU grid spaced signals. - Incoherent Light Source
When used in combination with a broadband light source the OTF-930 can be configured as a tunable light source. Although the output power is relatively low (- 30 to - 20 dBm) the incoherent light is especially useful for applications which are affected by coherent resonance effects or non-linear interference.
Application example: Checking the signal degradation tolerance of optical transceivers.
Filter Selections
| Filter Type |
03
|
04
|
06
|
||||||
|---|---|---|---|---|---|---|---|---|---|
| Filter Structure |
S1
|
S2
|
S3
|
S1
|
S2
|
S3
|
S1
|
S2
|
S3
|
| Bandwidth @ - 3 dB (nm) |
0.4 ± 0.1
|
0.3 ± 0.1
|
0.25 ± 0.1
|
0.5 ± 0.1
|
0.35 ± 0.1
|
0.3 ± 0.1
|
0.7 ± 0.1
|
0.5 ± 0.1
|
0.4 ± 0.1
|
| Bandwidth @ - 20 dB (nm)(Typ.) |
< 3.8
|
< 1.5
|
< 1.2
|
< 5.0
|
< 1.7
|
< 1.2
|
< 7.5
|
< 2.4
|
< 1.5
|
| Insertion Loss (dB) |
3.5
|
6
|
7.5
|
3
|
5
|
6.5
|
2.5
|
3
|
4
|
| Chromatic Dispersion (ps/nm)(Typ.) |
23
- 19 |
33.5
- 31.5 |
35
- 23 |
18
- 12.5 |
21.5
- 17.5 |
26
- 17 |
6.5
- 6.5 |
14.5
- 11 |
26.5
- 17.5 |
| Filter Type |
08
|
12
|
24
|
||||||
| Filter Structure |
S1
|
S2
|
S3
|
S1
|
S2
|
S3
|
S1
|
S2
|
S3
|
| Bandwidth @ - 3 dB (nm) |
0.95 ± 0.1
|
0.65 ± 0.1
|
0.5 ± 0.1
|
1.3 ± 0.1
|
0.9 ± 0.1
|
0.7 ± 0.1
|
2.9 ± 0.3
|
1.95 ± 0.3
|
1.5 ± 0.3
|
| Bandwidth @ - 20 dB (nm)(Typ.) |
< 9.8
|
< 3.0
|
< 2.2
|
< 15.0
|
< 4.5
|
< 3.0
|
< 32.0
|
< 10.0
|
< 6.5
|
| Insertion Loss (dB) |
2
|
3
|
3.5
|
2
|
2.5
|
3
|
2.5
|
2.5
|
2.5
|
| Chromatic Dispersion (ps/nm)(Typ.) |
7
- 7 |
8
- 5 |
12
- 10.5 |
3.5
- 4 |
5
-5 |
8
- 5.5 |
3.5
- 3.5 |
3.5
- 3.5 |
3.5
- 3.5 |
| Filter Type |
05 (1500 - 1630 nm)
|
12 (1270 - 1350 nm)
|
50
|
||||||
| Filter Structure |
S1
|
S2
|
S3
|
S1
|
S2
|
S3
|
S1
|
||
| Bandwidth @ - 3 dB (nm) |
0.5 ± 0.1
|
0.35 ± 0.1
|
0.3 ± 0.1
|
1.3 ± 0.15
|
0.9 ± 0.1
|
0.7 ± 0.1
|
5.5 ± 1.0
|
||
| Bandwidth @ - 20 dB (nm) |
< 5.0
|
< 1.7
|
< 1.2
|
< 15.0
|
< 4.5
|
< 3.0
|
< 60(Typ.)
|
||
| Insertion Loss (dB) |
4.5 * 1
|
6.5 * 1
|
8 * 1
|
3
|
3.5
|
4
|
2.9
|
||
| Chromatic Dispersion (ps/nm) (typ.) |
18
- 12.5 |
21.5
- 17.5 |
26
- 17 |
3.5
- 4 |
5
- 5 |
8
- 5.5 |
–
– |
||
|
Category
|
Parameter
|
Unit
|
Spec
|
Notes
|
| Wavelength Characteristics | Tuning Range |
nm
|
1530 to 1610
1500 to 1630 (05 bandwidth) 1270 to 1350 (12 bandwidth) |
|
| Resolution |
nm
|
0.01
|
Mechanical resolution | |
| Accuracy |
nm
|
<± 0.1, <± 0.15(24), <± 0.2(50)
|
||
| Repeatability |
nm
|
<± 0.05, < ±0.1(50)
|
n=50/Measured at center wavelength of slider | |
| Temperature Stability |
pm/℃
|
2
|
||
| Power Characteristics | PDL(SMF) |
dB
|
0.2
|
Filter Structure(S2) and (S3) |
| Insertion Loss *1 |
dB
|
Refer to “Filter Selections”(Typ.) | ||
| Return Loss *1 |
dB
|
> 45
|
||
| Power Monitor | Relative Accuracy |
dB
|
<± 0.1
|
Output Power : - 20 to + 10 dBm |
| Max Rating | Maximum Input Power |
dBm
|
+ 20
|
Damage Threshold |
| PMD | PMD |
ps
|
< 0.1
|
Design guaranteed performance |
| Environmental Conditions | Operating Temperature |
degC
|
20 to 30
|
|
| Operating Humidity |
%
|
< 80 RH
|
Non condensing | |
| Interface | Optical Fiber |
–
|
SMF or PMF *2
|
|
| Optical Connector |
–
|
FC or SC
|
||
| Connector Polish |
–
|
SPC or APC
|
*3 | |
| Power Supply | Communication Interface |
–
|
GPIB(IEEE-488) & RS-232C
|
|
| Voltage |
V
|
AC 100 to 240
|
||
| Frequency |
Hz
|
50 / 60
|
||
| Dimensions | Power Consumption |
VA
|
35@230 to 240 V
30@100 to 120 V |
|
| W x D x H |
mm
|
210 x 300 x 80
|
||
| Weight |
kg
|
4
|
*1: In case of PMF, the insertion loss increases by 1.0 dB
*2: In case of PMF, Polarization extinction ratio 20 dB (typical), Polarization axis in alignment with connector key
*3: SPC = Super Physical Contact, APC = Angled Physical Contact
Flat-Top Manual Tunable Filter
OTF-350
Manually controlled compact wavelength & bandwidth Tunable Filter- Flat-Top Filter Shape and Low IL
- Wavelength Range: 1530 to 1610 nm (C&L Band)
- Crosstalk > 50 dB(typ.)
Unique precision free-space optics and an accurate tuning mechanism deliver excellent optical control and a flat-top passband shape.
- Center wavelength and transmission bandwidth can be independently and continuously changed
- Wavelength range: 1530 to 1610 nm (C&L Band)
O-band is available upon request. - Flat-top filter shape
- Bandwidth: 0.2 to 10.0 nm (Normal type)
- Bandwidth: 0.1 to 15.0 nm (Wide type)
- 40 Gb/s, 100 Gb/s transmission test
- WDM wavelength tuning
- ASE noise filtering
- Pulse shaping
- Next generation bundle wavelength OXC
Manual Tunable Gaussian Filter
OTF-320
80 nm tuning thin-film dielectric coating based Tunable Filter- Gaussian Filter Shape
- Excellent PDL and PMD
- Analog Wavelength Indicator
Our OTF-320 is a manually tunable wavelength optical filter that uses a linear sliding method. This product has a wide variety of filter profile options by combining filter type and number of cascaded filters (S1, S2, and S3) to suit most fiber optic applications. It is suitable for basic laboratory use and also for system integration of wavelength selection during installation.
- Thin-Film Filter Based Tunable Filter
- Linear sliding method
- 80 nm tuning range
- Excellent transmission characteristics and low PDL over entire tuning range
- Analog wavelength indicator
- Wavelength tuning knob with lock function
- DWDM transmission systems
- ASE noise suppression for amplified signals
- Incoherent tunable light source with broadband light source
- Fiber sensing