Optical Communications Rules of Thumb
250 never-before-collected rules based on the authors' cumulative decades of experience in the field.
TABLE OF CONTENTS Optical Communications Rules of Thumb
Appendix A: Useful Values and Conversions
Overview
The following collection of values represent frequently needed information and conversion factors for the EO telecom practitioner. This eclectic collection consist of constants, conversions, and definitions categorized by the authors' whims. Although sometimes supplied, the authors are not encouraging the use of discouraged and archaic units. Such units are included here only as a help with their translation to more accepted SI units.
| Angular Measurement | |
|---|---|
| Degree (angle) | 0.01745 radians |
| Radian | 0.159 of the circumference |
| Steradian | 0.08 of total solid angle |
| RPM | 6 degrees/second |
| RPS | 21,600 degrees/minute |
| Area Measurements | |
|---|---|
| Square centimeter | 1.076 x10 3 feet 2 |
| Square mil | 645 microns 2 |
| Square inch | 6.452 centimeters 2 |
| Square foot | 939 centimeters 2 |
| dBm to Watts | |
|---|---|
| dBm to watts | 1 pW = 90 dBm |
| Density Measurements | |
|---|---|
| Density of Water (4 C, 760 mm Hg) | 1 g/centimeter 3 |
| Grams/Centimeter 3 | 0.036 pounds/inch 3 |
| Pounds/inch 3 | 27.7 grams/centimeter 3 |
| Electromagnetic Spectrum in Nanometers | |
|---|---|
| Gamma Rays | < 1 |
| X-rays | 1 20 |
| Ultraviolet | 20 to 400 |
| Visible | 400 to 750 |
| Near Infrared | 750 to 1200 |
| Short-Wave Infrared | 1200 to 3000 |
| Mid-Wave Infrared |
|
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