Inrad Optics

Skip to content

Potassium Dihydrogen Phosphate (KDP) & Potassium Dideuterium Phosphate (KD*P)

Overview

View the embedded image gallery online at:
http://www.inradoptics.com/products/non-linear-crystals/kd-p#sigProGalleria56893c3e0a

Click image to view gallery

KDP and KD*P Single Crystals

Potassium dihydrogen phosphate (KDP) and potassium dideuterium phosphate (KD*P) crystals offer excellent UV transmission, damage threshold and birefringence. Their primary uses include:

Frequency Conversion. KDP and KD*P crystals are employed in a variety of frequency conversion applications. Among them are second, third and fourth harmonic generation in Q-Switched and phase-locked Nd:YAG lasers.
Electro-Optic Modulation Devices. Both KDP and KD*P have high electro-optic coefficients, which makes well-suited for use in Pockels Cells and Q-Switches.

Large Crystals

The growth process used for KDP and KD*P produce large crystals. Standard sizes range up 60 mm in diameter. Inrad also grows and fabricates much larger custom sizes in-house.

Orientation Types

Different orientations refer to the angles between the beam propagation direction and the crystallographic direction of the optic axis.

Type I Orientations. The polarization directions of the two longest wavelengths in the mixing process are oriented in the same direction. The shortest wavelength in the mixing process has an orthogonal polarization direction.
Type II Orientations. The polarization directions of the two longest wavelengths in the mixing process are orthogonal to one another. The shortest wavelength in the mixing process has a polarization direction aligned to the polarization direction of the longest wavelength.

KDP Sizes

KDP Single Crystals

Size (mm)	Corresponding INRAD Cells	Notes
10 x 10 x 0.1	530-081, 535-080	5-14B size
10 x 10 x 0.25	530-081, 535-080	5-14B size
10 x 10 x 0.5	530-081, 535-080	5-14B size
10 x 10 x 1	530-081, 535-080	5-14B size
6.75 x 13.5 x 30	562-126	Autotracker size
13.5 x 13.5 x 15	531, 541 series	—
13.5 x 13.5 x 30	532, 542 series	—
13.5 x 18.5 x 30	563-1117	Autotracker size
60 dia x 2	ring mount	2-3 waves, best effort
60 dia x 3	ring mount	one wave flatness
60 dia x 4	ring mount	one wave flatness
76 dia x 2	ring mount	2-3 waves, best effort
76 dia x 3	ring mount	2-3 waves, best effort
76 dia x 4	ring mount	one wave flatness

KD*P Sizes

KD*P Single Crystals

Size (mm)	Corresponding INRAD Cells	Notes
6.75 x 13.5 x 30	526-126	Autotracker size
13.5 x 18.5 x 30	563-1117	Autotracker size
10 x 10 x 30	5-202/L	For 5-200A system
13.5 x 13.5 x 15	—	531, 541 series and 5-302 cell
13.5 x 13.5 x 30	—	532, 542 series and 5-302 cell

KDP Orientations

KDP Standard Orientations (all are Type I)

Designation	Angle θ	Operation	Input	Output
A	83.3°	SHG	518-535 nm	259-267 nm
B	69.1°	SHG	531-595 nm	266-297 nm
B1	73.4°	SHG	524-571 nm	262-285 nm
R6G	60.2°	SHG	559-673 nm	280-336 nm
C	54.9°	SHG	585-754 nm	293-377 nm
D	46.6º	SHG	648-940 nm	324-470 nm
M2	64.6º	SHG	543-648 nm	272-324 nm
M2	64.6º	MIX	1064nm + (294-383 nm)	231-281 nm
M3	76.4º	SHG	520-557 nm	260-278 nm
M3	76.4º	THG	1064nm + (273-307 nm)	217-238 nm
—	41.2º	SHG	1064 nm	532 nm
—	47.3º	THG	1064 nm + 532 nm	355 nm
TSS	45º	SHG	700-1000 nm	350-500 nm

KD*P Orientations

KD*P Standard Orientations (Type I and II)

Designation	Angle θ	Operation	Input	Output
—	53.7°	SHG (II)	1064 nm	532 nm
M1	59.5°	THG (II)	1064 nm + 532 nm	355 nm
M1	59.5°	SFM (II)	1064 nm + (421-1000 nm)	355 nm
—	86º	FHG (II) angle tune	532 nm	302-515 nm
—	90º	FHG (II) temp. tune	532 nm	266 nm
—	36.6º	SHG (I)	1064 nm	532 nm
—	46.8º	THG (I)	1064 nm + 532 nm	355 nm

back to top

Top