Third order nonlinear optical difference frequency generation in KH2PO4, TiO2, LiNbO3, CaCO3, ZnO and CdS

1977 ◽  
Vol 28 (4) ◽  
pp. 297-306 ◽  
Author(s):  
H. J. Eichler ◽  
H. Fery ◽  
J. Knof ◽  
J. Eichler
Keyword(s):  
Nonlinear Optical ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Third Order ◽  
Frequency Generation

QUASI-PHASE-MATCHED DIFFERENCE-FREQUENCY GENERATION IN NONLINEAR OPTICAL POLYMER WAVEGUIDES

2004 ◽  
Vol 13 (03n04) ◽  
pp. 391-396 ◽  
Author(s):  
MYUNG-HYUN LEE ◽  
JUNG JIN JU ◽  
MIN-SU KIM ◽  
JUNG YUN DO ◽  
SEUNG KOO PARK ◽  
...  
Keyword(s):  
Communication Systems ◽  
Nonlinear Optical ◽  
Optical Fiber Communication ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Wavelength Converter ◽  
Polymer Waveguides ◽  
Periodically Poled ◽  
Chain Polymer ◽  
Frequency Generation

Nonlinear optical (NLO) polymer is emerging as a new alternative material for a wavelength converter in optical fiber communication systems. We designed and synthesized a polyetherimide-based side-chain polymer with a 4-(dialkylamino)-4′(-(styrylsulfonyl)-stilbene chromophore as a new NLO polymer. We designed and fabricated periodically-poled NLO polymer waveguides for the wavelength converter. Difference-frequency generation (DFG) process with a quasi-phase-matching (QPM) scheme was used. For the first time, we demonstrated a wavelength converter with a DFG conversion efficiency of -47 dB in the periodically-poled NLO polymer waveguides, operating at ~ 1.55 μm.

SPECTROSCOPIC INVESTIGATION OF SURFACES AND INTERFACES BY USING INFRARED-VISIBLE SUM AND DIFFERENCE FREQUENCY GENERATION

2000 ◽  
Vol 07 (04) ◽  
pp. 423-436 ◽  
Author(s):  
ABDERRAHMANE TADJEDDINE
Keyword(s):  
Spectroscopic Investigation ◽  
Nonlinear Optical ◽  
Difference Frequency Generation ◽  
Difference Frequency ◽  
Inversion Symmetry ◽  
Optical Techniques ◽  
Surfaces And Interfaces ◽  
Frequency Generation

The nonlinear optical techniques of visible-infrared sum (SFG) and difference (DFG) frequency generation are addressed as a vibrational probe of surfaces and interfaces between media of inversion symmetry.

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