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Biased Photodetectors, 818-BB Series

Silicon, GaAs and InGaAs high speed biased photodetectors
Rise times down to 35 ps
Amplified detectors provide up to 26 dB gain
Built-in bias supply on unamplified photodetectors (except for BB-22 and BB-40)

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Overview
Specifications
Ordering
Literature & Downloads
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818-BB Series Biased Photodiode Detectors are cost effective diagnostic tools suitable for a variety of high speed applications such as viewing of Q-switched, mode-locked, or rapidly modulated laser signals and picosecond laser alignment.
Standard photodetectors (818-BB-20, -21, -30, -31 and -40) consist of free-space, small and large area Si, GaAs or InGaAs detectors, with rise times ranging from 300 ps–1.5 ns. Each unit, other than the 818-BB-40, includes a built-in bias supply consisting of standard 3 V lithium cells and a 50 ohm BNC connector output. The batteries are easily replaceable and by disconnecting the detector from the oscilloscope input, when not in use, you can extend the lifetime of the batteries. The 818-BB-40 comes with an external 24 VDC power supply.
The 818-BB-35 and 818-BB-45 photodiode detector modules offer a low-cost solution for ultra-fast measurements offering a 12.5 GHz bandwidth. These detectors are suitable for applications where detector risetime of <30 psec (<25 psec for 818-BB-35) are required for Q-switched and Ultrafast Laser output analysis. These detectors also utilize 3 V lithium cells (supplied).
The 818-BB-22 UV Enhanced Silicon Detector module consists of a silicon detector with an enhanced ultraviolet response, making it well suited for the fourth harmonic Nd:YAG, YLF or Glass Lasers and Excimer Lasers. Additionally, its large active area and fast response time make it an excellent general-purpose biased detector for the 200 to 1100 nm wavelength region. To attain its fast response, this detector comes with a 24 VDC external power supply.
The 818-BB-21A, -30A, -35A, and -45A, amplified high speed detector modules consist of Si or InGaAs detectors having a built-in amplifier with approximately up to 26 dB of gain. It is excellent for viewing rapid modulation of low-power CW lasers or other light sources in the µW regime. The detectors are AC coupled and feature a bandwidth ranging from 1.2GHz up to 10.7 GHz. A wall plug-in style power supply is provided with these units.
The 818-BB-35F, -45F, -35AF and -45AF are 1 meter long single mode fiber coupled high speed detectors with an FC connector .
The 818-BB-21TTL and-30TTL TTL photodetectors are based on our standard detectors with an additional TTL output whose threshold is adjustable, while their analog out exhibits performance characteristics on par with our equivalent standard products.

Detector Responsivity

Silicon

UV Enhanced Silicon

GaAs

InGaAs

NOTE-These detectors are very susceptible to damage by electrostatic discharge (ESD). Please use ESD protective measures, like the FK-STRAP , when unpacking and handling these devices.

Specifications (Unamplified)

Model	818-BB-20 ⁽²⁾	818-BB-21 ⁽²⁾	818-BB-22 ⁽⁵⁾	818-BB-30 ⁽²⁾	818-BB-31 ⁽²⁾	818-BB-35 818-BB-35F ^(2,6,8)	818-BB-40 ⁽⁵⁾	818-BB-45 818-BB-45F ^(2,6)	818-BB-50 818-BB-50F ^(5,6)
Wavelength Range (nm)	300-1100	300-1100	200-1100	1000-1600	1000-1600	1000-1650	300-1100	400-900	830-2100
Material	Silicon	Silicon	Silicon	InGaAs	InGaAs	InGaAs	Silicon	GaAs	Extended InGaAs
Rise Time (ps)	<200	<300	<1.5 ns	<175	<225	<25	<30 ns	<30	<35
Fall Time (ps)	<350	<300	<1.5 ns	<175	<225	<25	<30 ns	<30	<35
Responsivity	0.4 mA/W@ 830 nm	0.4 A/W @ 830 nm	0.5 A/W @ 830 nm	0.8 A/W @ 1300 nm	0.8 A/W @ 1300 nm	0.88 A/W @ 1550 nm	0.5 A/W @ 830 nm	0.45 A/W @ 850 nm	1.6 A/W @ 2.0 um⁽¹⁾
Bias Voltage (V)	3	9	24	6	6	6	24	6	3
Impedance, Load (Ω)	50	50	50	50	50	50	50	50	50
Cut Off Frequency (GHz)	>1.5	>1.2	>200 MHz	>2	>1.5	>12.5	>25 MHz	>12.5	>10 ^(3,4)
Active Diameter (µm)	Square with active area 0.006mm²	400	2.55 mm	100	100	32	4.57 mm	40	40
Dark Current (nA)	<1	<0.1	<10	<1	<1	<3	<20	<200 p A	<10 uA
Junction Capacitance (pF)	<4	<1.5	<10	<0.75	<1.25	<0.12	<45	<0.3	-
Reverse Breakdown (V)	40	20	150	25	25	25	50	30	-
Acceptance Angle⁽⁷⁾	20°	30°	50°	20°	-	-	60°	30°	-
Saturation Current (mA)	50	3	2.5	5	10	10	2	10	10
NEP (pW/√Hz)	<0.1	<1.5	<1	<0.1	<0.1	<0.04	<0.16	<0.02	<2 pW/√Hz @ 2.0um
Output Connector	BNC	BNC	BNC	BNC	BNC	SMA	BNC	SMA	SMA
Mounting (tapped hole)	8-32 and M4	8-32 and M4	8-32 and M4	8-32 and M4	8-32 and M4	8-32 and M4	8-32 and M4	8-32 and M4	8-32 and M4
Fiber Optic Connector	-	-	-	-	FC input receptacle on detector body	single mode FC/PC connectorized fiber optional	-	single mode FC/PC connectorized fiber optional	single mode FC/PC connectorized fiber optional

Specifications (Amplified, AC-coupled)

Model	818-BB-21A ⁽⁵⁾	818-BB-30A ⁽⁵⁾	818-BB-35A 818-BB-35AF ^(5,6)	818-BB-45A 818-BB-45AF ^(5,6)
Wavelength Range (nm)	300-1100	1000-1600	1000-1650	400-900
Material	Silicon	InGaAs	InGaAs	GaAs
Rise Time (ps)	<500	<400	<40	<40
Fall Time (ps)	<500	<400	<40	<40
Responsivity (V/W)	450 V/W @ 830 nm ⁽¹⁾	900 V/W @ 1300 nm ⁽¹⁾	900 V/W @ 1550 nm ⁽¹⁾	450 V/W @ 850 nm ⁽¹⁾
Bias Voltage (V)	24	24	5	5
Impedance, Load (Ω)	50	50	50	50
Cut Off Frequency (GHz)	>1.2^(3,4)	>1.5^(3,4)	>10.7^(3,4)	>10.7 ^(3,4)
Active Diameter (µm)	400	100	32	40
Acceptance Angle⁽⁷⁾	10°	20°	-
Saturation Current peak (mA)	1.3	1.3	-	45-
NEP (pW/√Hz)	<60	<30	<25	<45
Output Connector	BNC	BNC	SMA	SMA
Mounting (tapped hole)	8-32 and M4	8-32 and M4	8-32 and M4	8-32 and M4
Fiber Optic Connector	-	-	1m SMF pigtail w/ FC (optional)	1m SMF pigtail w/ FC (optional)

Specifications (TTL detectors)

Model	818-BB-21TTL ⁽⁵⁾	818-BB-30TTL ⁽⁵⁾
Analog Output
Wavelength Range (nm)	450-870	1000-1600
Material	Silicon	InGaAs
Rise Time (ns)	<8	<8
Fall Time (ns)	<9	<9
Responsivity (A/W)	0.4 @ 830 nm⁽¹⁾	0.8 @ 1.3 µm⁽¹⁾
Power Supply (V)	12	12
Impedance, Load (Ω)	50	50
Cut Off Frequency (GHz)	>1.2⁽⁴⁾	>2⁽⁴⁾
Active Diameter (µm)	400	100
Acceptance Angle⁽⁷⁾	10°	20°
Saturation Current (mA)	3	5
Output Connector	BNC	BNC
Mounting (tapped hole)	8-32 and M4	8-32 and M4
Fiber Optic Connector	-	-
TTL Output
Rise Time (ns)	< 8
Fall Time (nm)	< 9
Adjustable Trigger Threshold (mV)	40 - 500
Threshold Monitor	External
Minimum Detectable Pulse Width (ns)	< 8
Frequency Response	DC - 60 MHz
Logic High (V)	> 3.0
Logic Low (V)	< 0.5
Pulse Stretch (when enabled) (ns)	100 typ.
Termination (Ω)	500 typ.
Output Connector	BNC

1) Detector has maximum peak voltage of 1.3 V.
2) Batteries are included.
3) AC coupled detector requiring input of >30 kHz.
4) If the full bandwidth is not needed, use lowpass, bandpass or highpass filters to remove excess noise.
5) Includes a universal AC/DC adaptor.
6) The -XXF versions have a 1 m, single-mode fiber pigtail with an FC/PC connector.
7) Half-angle.
8) 818-BB-35F comes with a wall plug supply.

Ordering Information

Model	Description	avail raw	Availability	price raw	Price	Qty. MULTI ADD
300-04300-0002	24 V power supply for 818-BB detectors	0	In Stock	49	$49.49	ADD
300-04300-0005	5 V power supply for 818-BB detectors	3	3 Weeks	35	$35.35	ADD
300-04300-0006	12 V power supply for 818-BB detectors	3	3 Weeks	35	$35.35	ADD
818-BB-20	Biased Photodetector, 300-1100nm, Silicon, 1.5 GHz	0	In Stock	364	$364.61	ADD
818-BB-21	Biased Photodetector, 300-1100nm, Silicon, 1.2 GHz	0	In Stock	364	$364.61	ADD
818-BB-21A	Amplified, Biased Photodetector, AC coupled, 300-1100nm, Silicon, 1.2 GHz	2	2 Weeks	621	$621.15	ADD
818-BB-21TTL	Biased Photodetector, TTL & Analog Output, 450-870 nm, Silicon	4	4 Weeks	691	$691.85	ADD
818-BB-22	Biased Photodetector, 200-1100nm, Silicon, 200 MHz	0	In Stock	515	$515.10	ADD
818-BB-30	Biased Photodetector, 1000-1600nm, InGaAs, 2 GHz	0	In Stock	406	$406.02	ADD
818-BB-30A	Amplified Biased Photodetector, AC coupled, 1000-1600nm, InGaAs, 1.5 GHz	0	In Stock	621	$621.15	ADD
818-BB-30TTL	Biased Photodetector, TTL & Analog Output, 1000-1650 nm, InGaAs	4	4 Weeks	691	$691.85	ADD
818-BB-31	Biased Photodetector, 1000-1600nm, InGaAs, FC Receptacle, 1.5 GHz	0	In Stock	437	$437.33	ADD
818-BB-35	Biased Photodetector, 1000-1650nm, InGaAs, 12.5 GHz	0	In Stock	1035	$1,035.25	ADD
818-BB-35A	Amplified Biased Detector, AC coupled, 1000-1650nm, InGaAs, 10.7 GHz	4	4 Weeks	2878	$2,878.50	ADD
818-BB-35AF	Amplified Biased Detector, AC coupled, 1000-1650nm, InGaAs, 1m FC, 10.7 GHz	0	In Stock	3322	$3,322.90	ADD
818-BB-35F	Biased Photodetector, 1000-1650nm, InGaAs, 1MmFC Pigtail, 12.5 GHz	0	In Stock	1274	$1,274.62	ADD
818-BB-40	Biased Photodetector, 300-1100nm Silicon, 25 MHz	0	In Stock	358	$358.55	ADD
818-BB-45	Biased Photodetector, 400-900nm, GaAs, 12.5 GHz	0	In Stock	931	$931.22	ADD
818-BB-45A	Amplified Biased Photodetector, AC coupled, 400-900nm, GaAs, 10.7 GHz	0	In Stock	2747	$2,747.20	ADD
818-BB-45AF	Amplified Biased Detector, AC coupled, 400-900nm, GaAs, 1M FC Pigtail, 10.7 GHz	4	4 Weeks	3221	$3,221.90	ADD
818-BB-45F	Biased Photodetector, 400-900nm, GaAs, 1m FC Pigtail, 12.5 GHz	0	In Stock	1144	$1,144.33	ADD

The 818-BB series is universal and will work for 110 or 220V.
* Note: for flat top or square wave pulses, negative voltages may read, due to capacitor discharge. For more details, contact a Newport application engineer.

Newport Resource e-Catalogs *

*e-Catalog pages include the most current information available at the time of printing.

Technical References

818BB Battery Installation (1 MB)

User Manuals

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