OFR IR Isolators

OFR Globe

HoYAG(1900-2200nm)

Pol. Independent

Alignment Inst.

Body Types

I	II	III
IV	V	VI
VIIa	VIII	IX
X	D

FIXED NARROWBAND "ASPIRIN TABLET" ISOLATORS (IO-D SERIES)
Catalog Number	Aperture	Select λ between	Use between	Trans.	Iso.	Max. Power (cw)
IO-D-λ*	1.75 mm	1290-1325 nm **	± 20 nm	~ 96%	> 40 dB	1 W
IO-D-λ *	1.75 mm	1450-1660 nm **	± 20 nm	~ 96%	> 40 dB	1 W
IO-D-1550-SS *	1.70 mm	1550 nm **	± 20 nm	~ 96%	> 40 dB	1 W
See body type D * IO-D isolators have VLP polarizers. Proper alignment of VLP polarizers is required because of absorption concerns. Discuss with OFR. ** Other wavelengths are also available. Discuss with OFR.

NARROWBAND ADJUSTABLE ISOLATORS (IO-λlSERIES)
Catalog Number	Aperture	Select λ between	Use between	Trans.	Iso.	Body Type
IO-2.5-λ-VLP **	2.5 mm	1260-1650 nm	± 40 nm *	> 95%	> 40 dB	I
IO-4-λ-VLP **	4.0 mm	1310 or 1550 nm	± 40 nm *	> 95%	> 40 dB	VIIa
IO-5-λ-VLP **	5.0 mm	1310 or 1550 nm	± 40 nm *	> 95%	> 40 dB	VIIa

IO-2.5-λ-HP ***	2.5 mm	1260-1650 nm	± 40 nm *	> 92%	> 36 dB	IV
IO-4-λ-HP ***	4.0 mm	1310 or 1550 nm	± 40 nm *	> 92%	> 36 dB	VIa
IO-5-λ-HP ***	5.0 mm	1310 or 1550 nm	± 40 nm *	> 92%	> 36 dB	VIa
IO-8-λ-HP ***	8.0 mm	1550 nm	± 40 nm *	> 91%	> 33 dB	VIa
IOT-any of above: Isolation is ~60 dB. Transmittance is squared. * Discuss with OFR if intended use is outside "selected λ limits. Proper alignment of VLP polarizers is required because of absorption concerns. Discuss with OFR. * Rated Power: 20 W cw max recommended for 2-3 mm beams. Discuss with OFR.

NARROWBAND ADJUSTABLE ISOLATORS (IO-λ-SERIES)
Catalog Number	Aperture	Select λ between	Use between	Trans.	Iso.	Body Type
IO-2.5-λ-HP **	2.5 mm	1950-2200 nm	± 100 nm * *	91-93%	> 33 dB	IV
IO-4-λ-HP **	4.0 mm	1950-2200 nm	± 100 nm * *	91-93%	> 33 dB	VIa
IO-5-λ-HP **	5.0 mm	1950-2200 nm	± 100 nm * *	91-93%	> 33 dB	VIa
IO-6-λ-HP **	6.0 mm	1950-2200 nm	± 100 nm * *	91-93%	> 33 dB	VIa
* Discuss with OFR if intended use is outside "selected λ limits. ** Rated Power: 20 W cw max recommended for 2-3 mm beams

TYPES OF POLARIZERS AND POWER LIMITS
Model	Type of Polarizer	CW	Pulsed *	Comments
VLP	Thin Plate	25 W/cm²	300 kW/cm²	Narrowband
HP	Air-spaced Calcite	500 W/cm²	150 MW/cm²	Broadband
* Pulsed measurements made at 1064 nm, 20 ns pulse width, 20 Hz.

Isolator Types
IO-λ Series	IO-D Series
Extremely large λ selection Tweakable Best for single λ	Very small Single λ Not adjustable

POLARIZATION INDEPENDENT ISOLATORS
Catalog Number & Polarizer	Aperture	Select λ	Trans.	Iso.	Body Type
IO-1.5PI-λ-PBB *	1.5 mm	1040 - 1085 nm **	> 92% ***	28-35 dB	VIII

IO-1.5PI-λ-PBB *	1.5 mm	1310 or 1550 nm **	> 93% ***	28-36 dB	****
IO-2PI-λ-PBB *	2.0 mm	1310 or 1550 nm **	> 93% ***	28-38 dB	****
IO-2.5PI-λ-PBB *	2.5 mm	1310 or 1550 nm **	> 93% ***	28-36 dB	****
* The rated power for PBB polarizers is similar to that of HP polarizers (500 W/cm2 max cw, 150 MW/cm2 max pulsed). Other wavelengths are also available. Discuss with OFR. * Transmittance for beam < 50% of clear aperture. **** Mounted on OFR FiberTable. 1.5PI length 113 mm, 2PI & 2.5PI length 148 mm.

½-WAVE RETARDERS
Catalog Number	Description	Bandwidth	Laser Power
RZ-1/2-λ-IO *	Zero-order, Narrowband	+ 6 nm	VHP
RMA-1/2-NIR-IO	Zero-order, Broadband	700-900 nm	HP
RMA-1/2-IR-IO-2.5	Zero-order, Broadband (used with IO-2.5)	1200-1600 nm	HP
RMA-1/2-IR-IO-4.0	Zero-order, Broadband (used with IO-4)	1200-1600 nm	HP
* Specify wavelength when ordering. For example, RZ-1/2-810-IO. Note: The retarder mounting cell is available for isolator body types IV, V, VI, VIII, and IX. If a waveplate is desired for other isolators, discuss with OFR.

Body Types
Click on the appropriate link for dimensions.

Body D	Body Type I	Body Type IV
Body Type VI	Body VIIa

Optics for Research · Ph 973-579-7227 · Fax 973-300-3600 · Email: info@ofr.com