Related Manuals for Bookham New Focus 2051
Summary of Contents for Bookham New Focus 2051
- Page 1 sales@artisantg.com artisantg.com (217) 352-9330 | Click HERE Find the Newport / New Focus 0921 at our website:...
- Page 2 205x 10MHz Adj Rcvr revA.fm Page 1 Monday, January 10, 2005 9:29 AM U S E R ’ S G U I D E 10-MHz Adjustable Photoreceivers Models 2051 & 2053 2584 Junction Avenue • San Jose, CA 95134-1902 • USA phone: (408) 919–1500 •...
- Page 3 Information in this document is subject to change without notice. Copyright 2004, New Focus, Inc., a division of Bookham Technology plc. All rights reserved. logo and NEW FOCUS, Inc. are trademarks or registered trademarks of Bookham Technology plc in the U.S.A or other countries.
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Page 4: Table Of Contents
205x 10MHz Adj Rcvr revA.fm Page 3 Monday, January 10, 2005 9:29 AM Contents Operation Introduction ......... . . 5 Using the Photoreceiver. - Page 5 205x 10MHz Adj Rcvr revA.fm Page 4 Monday, January 10, 2005 9:29 AM 4 • Contents NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 6: Operation
205x 10MHz Adj Rcvr revA.fm Page 5 Monday, January 10, 2005 9:29 AM Operation Introduction The Model 205X is a general-purpose photoreceiver with adjustable gain and bandwidth. These receivers ± can be powered by batteries or by an external 15-V power supply. - Page 7 205x 10MHz Adj Rcvr revA.fm Page 6 Monday, January 10, 2005 9:29 AM Figure 1: Typical 2053 responsivities of the Model 2051 & 2053 photodiodes 2051 1200 1600 Wavelength (nm) To obtain the value of the “response factor” in V/mW, divide the Note: Note: photodiode responsivity by 1.5.
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Page 8: Using The Photoreceiver
205x 10MHz Adj Rcvr revA.fm Page 7 Monday, January 10, 2005 9:29 AM Using the Photoreceiver 1. Mount the photoreceiver. Use the 8-32 thread (M4 for metric versions) on the bottom of the cas- ing to mount the photoreceiver to a post or pedes- tal. - Page 9 205x 10MHz Adj Rcvr revA.fm Page 8 Monday, January 10, 2005 9:29 AM conditions with low light levels and a high impedance load attached to the BNC connector, the photoreceiver draws about 20 mA from the batteries, and the battery lifetime is approximately 24 hours.
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Page 10: General Features & Principles
205x 10MHz Adj Rcvr revA.fm Page 9 Monday, January 10, 2005 9:29 AM General Features & Principles Photoreceiver Circuitry The circuitry inside the Model 205X consists of a photodiode followed by a three-stage transimpedance amplifier. The gain can be adjusted from 626 V/A to 18.8x10 V/A in 5-dB steps. - Page 11 205x 10MHz Adj Rcvr revA.fm Page 10 Monday, January 10, 2005 9:29 AM The following table summarizes the bandwidth at each gain setting. The bandwidth on the 3x settings is somewhat lower than the 1x settings, and significantly decreases at the highest gain settings. There is little difference in frequency response between the visible (Model 2051) and IR (Model 2053) models.
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Page 12: Optical Power And Output Voltage
205x 10MHz Adj Rcvr revA.fm Page 11 Monday, January 10, 2005 9:29 AM where P is the input optical power in Watts, R is the photodetector’s response factor in V/mW, and G is the amplifier’s gain setting. Estimate the value of the response factor by dividing the Note: Note: responsivity shown in Figure 1 by 1.5. - Page 13 205x 10MHz Adj Rcvr revA.fm Page 12 Monday, January 10, 2005 9:29 AM 12 • General Features & Principles NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 14: Frequency Response And Noise
205x 10MHz Adj Rcvr revA.fm Page 13 Monday, January 10, 2005 9:29 AM Frequency Response and Noise Measuring Bandwidth The frequency response and noise characteristics of the adjustable photoreceiver depend on the selected gain. The figures beginning on page 16 give the typical frequency response and noise behavior for the photoreceivers at each of the gain settings. - Page 15 205x 10MHz Adj Rcvr revA.fm Page 14 Monday, January 10, 2005 9:29 AM Another way to characterize the noise is with the photocurrent noise (I ), which is related to NEP by = R · NEP, where R is the photodetector’s responsivity (in A/W). The photocurrent noise is independent of wavelength because it gives the noise of the photoreceiver with the photodetector’s responsivity factored out.
- Page 16 205x 10MHz Adj Rcvr revA.fm Page 15 Monday, January 10, 2005 9:29 AM setting is 330 pW when operating at full detector bandwidth. You can further improve your signal-to-noise ratio by using optical modulators or choppers with lock-in amplifiers to limit the detection bandwidth. Using such techniques you can reduce equivalent bandwidth to 1 Hz or less.
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Page 17: Performance Data For Frequency Response
205x 10MHz Adj Rcvr revA.fm Page 16 Monday, January 10, 2005 9:29 AM bandwidth signal-to-noise ratio of 1 is achieved around 120 pW. Note that this assumes operation without any post- photoreceiver filtering and with the full photoreceiver bandwidth. By using the built-in electronic band-pass filter or an optical chopper and a lock-in amplifier, the receiver can detect significantly weaker optical signals. - Page 18 205x 10MHz Adj Rcvr revA.fm Page 17 Monday, January 10, 2005 9:29 AM Gain Setting=10 0.01 Frequency (MHz) Gain Setting=10 0.01 Frequency (MHz) Gain Setting=10 0.01 Frequency (MHz) Models 2051 & 2053 Frequency Response and Noise • 17 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 19: Performance Data For Noise
205x 10MHz Adj Rcvr revA.fm Page 18 Monday, January 10, 2005 9:29 AM Performance Data for Noise Figure 4 shows the typical noise spectrum expressed as photocurrent noise for Model 205X photoreceivers on the highest gain setting. To derive the receiver’s Noise Equivalent Power (NEP), divide the photocurrent noise by the photodiode responsivity. - Page 20 205x 10MHz Adj Rcvr revA.fm Page 19 Monday, January 10, 2005 9:29 AM Figure 4: 205 X Output Noise Current Typical noise 0.40 spectrum for Model 205X 0.35 Spec 0.30 Gain = 3 x 10 0.25 0.20 Frequency (KHz) Models 2051 & 2053 Frequency Response and Noise •...
- Page 21 205x 10MHz Adj Rcvr revA.fm Page 20 Monday, January 10, 2005 9:29 AM 20 • Frequency Response and Noise NEW FOCUS, Inc. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 22: Characteristics
205x 10MHz Adj Rcvr revA.fm Page 21 Monday, January 10, 2005 9:29 AM Characteristics Physical Specifications Figure 5: power 1.78" 1.16" Mechanical switch (45.2) (29.3) low freq. drawing of the corner high freq. corner adjust Model 205X adjust knob photo- knob casing detector... -
Page 23: Model 2051 Specifications
205x 10MHz Adj Rcvr revA.fm Page 22 Monday, January 10, 2005 9:29 AM Model 2051 Specifications Model 2051 Wavelength Range 300–1070 nm 3-dB Bandwidth 10 MHz, 5 MHz, 150 kHz Rise Time 80 ns Peak Conversion Gain 9.4 x 10 Typical Max. -
Page 24: Model 2053 Specifications
205x 10MHz Adj Rcvr revA.fm Page 23 Monday, January 10, 2005 9:29 AM Model 2053 Specifications Model 2053 Wavelength Range 900–1700 nm 3-dB Bandwidth 10 MHz, 5 MHz, 150 kHz Rise Time 80 ns Peak Conversion Gain 18.8 x 10 Typical Max. -
Page 25: Customer Service
205x 10MHz Adj Rcvr revA.fm Page 24 Monday, January 10, 2005 9:29 AM Customer Service Technical Support Information and advice about the operation of any New Focus product is available from our applications engineers. For quickest response, ask for “Technical Support”...
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