Moving Fiber Optic Switches

Moving Fiber Switch

Feature Summary


The CORALIGN™ Difference

The CORALIGN™ portfolio of fiber optic switches utilizes the moving fiber design concept to achieve direct fiber to fiber connections.

These singlemode fiber optic switches achieve their high accuracy through the use of the patented precision deflection structure that is at the heart of each optical switch.

A CORALIGN™ switch physically moves optical fibers to axially align with different optical fibers. The ability to produce a fiber optic switch void of collimating lenses, mirrors and the need for alignment fixtures is key to delivering competitively priced, quality switches. Luminos Industries has developed the custom in-house production equipment that delivers these results.

It should also be noted that, due to their low cost, these switches should be considered as a viable alternative for those applications traditionally handled by more restrictive fiber optic couplers.

Low Losses

The simplicity of the direct fiber to fiber connection through an air or oil filled gap allow CORALIGN™ fiber optic switches to achieve the lowest insertion losses in the industry.

The low loss version uses indexing matching oil in the gap to achieve a lower insertion loss. In certain circumstances such as high power applications, oil cannot be used in the gap and we recommend using the normal loss version with an air gap.

Wavelength Independent

The elimination of any lenses in the moving fiber design mean the CORALIGN™ optical switch is wavelength independent and can handle any wavelength compatible with the fiber used.

High Power Application

Another advantage of the CORALIGN™ moving fiber design is that there is no epoxy or lenses between fibers, making it suitable for high power applications.

Our multimode, normal loss (air gap) switches have been qualified for 500mW hot switching for 532-1300nm given the recommended voltage and a switching rate not exceeding 5Hz.

High power applications for other switch types are possible but are subject to additional qualification. Contact us to discuss your application and requirements.

Drive Modes

Almost all switches (the center off 1x2 is an exception) have 2 possible "Drive Mode" options: latching or non-latching. The drive mode is specified by the part # when ordering and cannot be changed.


A latching switch requires a short electrical pulse to change state and will maintain the new state without power.

Electrical Connectivity
Pin State 1 State 2
1 V+ V=0
2 Gnd Gnd
3 V=0 V+


A non-latching switch is in state 1 with the power off and changes to the state 2 with power on. When power is removed, the switch reverts to state 1.

Electrical Connectivity
Pin State 1 State 2
1 Gnd Gnd
2 V=0 V=0
3 V=0 V+


The following configurations are available:


Optical Characteristics
Singlemode Multimode
low loss normal loss low loss normal loss
Insertion Loss 1550nm1
Typical, no connector 0.35dB 0.7dB 0.05dB 0.5dB
Maximum, no connector 0.7dB 1.2dB 0.20dB 0.8dB
Insertion Loss 1310nm1
Typical, no connector 0.25dB 0.8dB 0.05dB 0.5dB
Maximum, no connector 0.6dB 1.3dB 0.20dB 0.8dB
Insertion Loss 850nm1
Typical, no connector NA 0.10dB 0.6dB
Maximum, no connector 0.25dB 0.9dB
Switching Time
Typical 7ms 7ms
Max at 25°C 10ms 10ms
Max at 70°C 12ms 12ms
Back Reflection
Typical -65dB -60dB -60dB -60dB
Maximum -55dB -50dB -50dB -50dB
Max -70dB -70dB
Optical Power (Hot Switching)
Max +17dBm
(up to +27dBm
Higher power possible with additional qualification.
Contact us to discuss your application.
Singlemode Multimode
Typical (0°C-70°C) ±0.1dB ±0.1dB
Max(0°C-70°C) ±0.3dB ±0.3dB
Lifetime Drift
Max @ 107 cycles ±0.2dB ±0.2dB
Max 0.01dB 0.01dB
Environmental Characteristics
Temperature Range
Operational 0°C to 70°C
Storage -30°C to 70°C
Relative Humidity
Non-Condensing 90%
Max (power on) 20G's
Max (non-operational) 50G's
Fiber & Cable Characteristics
Singlemode Multimode
Fiber Type 9/125µ 62.5/125µ3
Cable Type (tight buffer) 900µ 900µ
Connector Type Available Pigtail, FC, SC, LC or ST
Lead Length (others available) 1m 1m
Electrical Characteristics
5 Volt (standard) 3 Volt 5 Volt High Current
Design Voltage 5V 3V 5V
Current (Typical) 50mA 86mA 100mA
Switch Voltage 4.2V - 6.0V 2.5V - 4V 4.2V - 6.0V
Coil Resistance 100ohm ±10% 35ohm ±10% 50ohm ±10%
Electrical Interface 3 Pin Header 0.1 Spacing
Physical Characteristics
Package Dimensions (w x d x h) 1.6" x 1.4" x 0.55"
Weight (excluding connectors) 1.6oz
  1. In 2x2 version; path 1-4 has two air gaps and twice the insertion loss indicated above. Specifications are subjected to change without notification.
  2. 500mW hot switching for 532nm-1300 for all air-gap switches with MM fiber. Electrical Drive must be at recommended voltage with a transition time <1msec and a rate of switching not to exceed 5 Hz without additional customer qualification.
  3. 50/125µ and 100/140µ also available for MM


CORALIGN™ optical switches have passed the following Telcordia Tests:

  • GR1221: 6.2.1 Mechanical Shock (Impact Test)
    Based on MIL_STD-883, Method 2002
  • GR1221: 6.2.2 Variable Frequency Vibration Test
    Based on MIL-STD-993, Method 2007
  • GR1221: 6.2.3 Thermal Shock Test
    Based on MIL-STD-883 Method 1011
  • GR1209: 5.1.9 Cable Retention
  • GR1221: 6.2.7 Temperature Cycling Test
  • GR1221: 6.2.4 High Temperature Storage Test
  • GR1221: 6.2.6 Low Temperature Storage Test

Contact us for detailed information