The LNPM-300 series from Gracyfiber are industrial-grade lithium niobate (LiNbO₃) phase modulators designed for long-term stability and high-volume deployment. Available in two standard wavelengths—LNPM-300-13 (1310 nm) and LNPM-300-15 (1550 nm)—they are built on Gracyfiber’s mature LiNbO₃ electro-optic platform and supported by years of mass production experience. The series delivers consistent performance in demanding applications such as quantum key distribution (QKD), laser frequency stabilization, coherent optical systems, and interferometric sensing.
General Specifications
LNPM-300-13 (1310 nm)
LNPM-300-15 (1550 nm)
Operating Wavelength
1310 ± 20 nm
1550 ± 20 nm
Insertion Loss
≤ 4 dB
≤ 4 dB
Optical Return Loss
≤ -45 dB
≤ -45 dB
Optical Input Power
100 mW (maximum)
100 mW (maximum)
Pigtail Polarization Extinction Ratio
≤ -28 dB (-45°C to +75°C)
≤ -28 dB (-45°C to +75°C)
Electro-Optical Bandwidth (-3 dB)
≥ 300 MHz
≥ 300 MHz
Halfwave Phase Modulation Voltage (Vπ)
≤ 4 V
≤ 4 V
Waveguide Process
Annealed Proton Exchange
Annealed Proton Exchange
Electrode Type
Push-pull
Push-pull
Absolute Maximum Ratings
LNPM-300-13 (1310 nm)
LNPM-300-15 (1550 nm)
Modulation Voltage
±15 V
±15 V
Optical Input Power
23 dBm
23 dBm
Operating Temperature
-45 °C to +75 °C
-45 °C to +75 °C
Storage Temperature
-55 °C to +85 °C
-55 °C to +85 °C
Mechanical Specifications
LNPM-300-13 (1310 nm)
LNPM-300-15 (1550 nm)
Housing Material
Kovar
Kovar
Input Fiber
1310 SM/PM/125 (or 80 µm)
1550 SM/PM/125 (or 80 µm)
Output Fiber
1310 SM/PM/125 (or 80 µm)
1550 SM/PM/125 (or 80 µm)
Fiber Coating Diameter
250 µm (or 160 µm)
250 µm (or 160 µm)
Fiber Length
1.5 m
1.5 m
Fiber Alignment Orientation
Slow Axis aligned to TE mode
Slow Axis aligned to TE mode
Electrical Signal Input Pins 1 to 3
Diameter 0.5 mm
Diameter 0.5 mm
Package
Ordering information
LNPM – 300 – xx – xxx
Wavelength
Code (xx)
Fiber Type (core/clad)
Code (xxx)
1310 nm
13
80/160 µm
080
1550 nm
15
125/250 µm
125
Why Gracyfiber Fiber Arrays
More than assembly — engineered performance you can rely on.
20+ years of fiber alignment & optical packaging experience
ISO cleanroom manufacturing with strict process control
Customization that scales — pitch, MFD, polishing, substrates
