Miniature Variable Optical Delay Line VDL-004
The VDL-004 is a miniature variable optical delay line designed specifically for OEM applications. This device offers continuous control with high precision, zero backlash, and good thermal stability. An internal mirror can be installed to cause light to double pass the device, doubling the delay range. A locking mechanism is provided for locking the delay at a permanent position. The VDL-004 generally comes with single mode or PM fiber pigtails per customer requirement. With a footprint of only 78×22×15 mm for a delay range of 130 ps (40 mm), the device can be easily integrated into larger instruments or assemblies for precision optical path length control or timing alignment. Convenient mounting brackets allow mounting in any orientation, as well as easy integration of multiple units on a base plate to form an array.
Applications
Microwave Photonics
Phased Array Antennas
Coherent Detection Systems
Optical Time Division Multiplexing (OTDM)
Optical Coherence Tomography (OCT)
Optical Interferometry
Optical Fourier Spectrum Analysis
Fiber Sensors
Features
Compact
Continuous Adjustment
Zero Backlash
Low Insertion Loss
High Stability
Durable
Flexible mounting options
Preliminary Specifications
Operating Wavelength2
SM: 840 ± 50nm, 1060 ±50 nm, 1260-1650 nm
PM: 840, 1060, 1310 or 1550 nm ± 50 nm
Optical Delay Range
0 ~ 130 ps (40mm) continuous
Optical Delay Resolution
Continuous
3.34 ps (1 mm) per full turn
Delay Temperature Stability
(0.52+0.008*delay) µm/°C
where “delay” = optical delay in mm
Delay Repeatability3
<20µm
Zero Point Delay Offset4
230 ps
Insertion Loss1
<0.8 dB
Insertion Loss Variation1
<0.4 dB over entire range
PDL1
0.1 dB for single mode fiber
Return Loss1
55 dB
Extinction Ratio
>20 dB for PM model
Optical Damage Power Threshold
300 mW
Operating Temperature
−15°C to 55°C
Storage Temperature
−40°C to 80°C
Fiber Type
840nm: HI780 or PM Panda
1060nm: HI1060 or PM Panda
1310 and/or 1550nm: SMF-28 or PM Panda
Position locking
Included
Dimensions
78 (L) × 22 (W) × 15 (H) mm
Notes:
1. Specifications in table apply for a single-pass device without connectors, measured over 1310 ± 50 nm or 1550 ± 50 nm at 23±5°C. The output pigtail can also be replaced with a Faraday mirror to create a double pass device with a total range of 260 ps. Specifications may be different for double pass devices or for wavelengths other than 1310 or 1550nm.
2. Other wavelengths available upon request. Contact General Photonics for details.
3. Optical delay variation after rotating the dial 2 full turns in one direction, then returning to original position.
4. Absolute delay at 0ps setting, excluding fiber.
Dimensions (in mm):
Base Plate:
Array Mounting Options:
Typical Performance Data:
Insertion loss vs. position measured while increasing or decreasing delay setting. The IL variation is low over the measured range, and the IL at any given position is independent of the direction of motion.
Ordering Information:
Configuration Notes:
1. Wavelength: 35 option (dual window 1310/1550nm) is available only for SM single-pass devices. PM or double-pass devices are single-window (e.g. 1310 or 1550nm) only.
2. Double-pass only available with SM fiber.
3. Double-pass not available for 840 or 1060nm.
商品属性 [波长] SM: 840 ± 50nm, 1060 ±50 nm, 1260-1650 nm PM: 840, 1060, 1310 or 1550 nm ± 50 nm [光纤类型] 840nm: HI780 or PM Panda 1060nm: HI1060 or PM Panda 1310 and/or 1550nm: SMF-28 or PM Panda