Products

LiNbO₃ Phase Modulator 20 GHz

Key Features

Modulation bandwidth: ～20 GHz
Low half-wave voltage (Vπ)
High optical power handling capability
Low insertion loss

Applications

Fiber sensing and optical communications
Coherent laser beam combining
Phase delay / phase shifter
Quantum key distribution (QKD) systems
Radio-over-Fiber (RoF) systems

Products Overview

GracyFiber’s lithium niobate (LiNbO₃) electro-optic phase modulator, fabricated using titanium indiffusion technology, features low insertion loss, 20 GHz modulation bandwidth, low half-wave voltage (Vπ), and high optical damage threshold. It is primarily used in high-speed optical communication systems for chirp control, phase shifting in coherent communication systems, sideband generation in radio-over-fiber (RoF) systems, and suppression of stimulated Brillouin scattering (SBS) in analog fiber-optic links.

Parameter	Symbol	Min	Typical	Max	Unit
Optical Characteristics
Operating Wavelength	λ	1520	—	1570	nm
Insertion Loss	IL	3	3.5	4	dB
Optical Return Loss	ORL	—	-45	—	dB
Fiber Type (Input/Output)	μm	Panda PM (7/80/165)	—	—	—
Fiber Connector	—	FC/PC, FC/APC, or specified	—	—	—
Electrical Characteristics
3dB Bandwidth	S₂₁	—	18	20	GHz
Half-Wave Voltage @ 50 kHz	Vπ	3	4	4.5	V
Electrical Return Loss	S₁₁	—	-12	-10	dB
RF Impedance	Z_RF	50	50	50	Ω
RF Port Interface	—	K-type (female)	K-type (female)	K-type (female)	—
Absolute Maximum Ratings
Max Input Optical Power @1550 nm	P_in,Max	—	—	17	dBm
Max RF Input Power	—	—	—	27	dBm
Operating Temperature	T_op	-10	—	60	°C
Storage Temperature	T_st	-40	—	85	°C
Relative Humidity	RH	5	—	90	%

S₁₁ and S₂₁ response curves

Mechanical Dimensions

Ordering Information

GF-PM-15-20G

GF	Modulator Type	Operating Wavelength	Bandwidth	Fiber Type	Connector Type
Product series (GracyFiber)	PM = Phase Modulator	15 = 1550 nm	20G = 20 GHz	PP—PM/PMF	FA = FC/APC, FP = FC/PC, SP = Customer-Specified