| Laser properties      | Laser wavelength peak (nm)                           | 1535  |
|                       | Emission cross section (x10-20 cm2)                  | 0.8   |
|                       | Fluorescence lifetime (ms)                           | 7.9   |
|                       | Fluorescence line width (nm) FWHM                    | 55    |
|                       |                                                      |       |
| Optical properties    | Index of refraction (n D)                            | 1.533 |
|                       | Index of refraction (laser line)                     | 1.521 |
|                       | dn/dT (20-40degC) (x10-7/degC)                       | -10   |
|                       | Temperature coeff. of optical path (10-6/K)          | 3.3   |
|                       |                                                      |       |
| Thermal properties    | Transformation temperature (degC)                    | 450   |
|                       | Deformation temperature (degC)                       | 485   |
|                       | Coeff. of thermal expansion (10-7degC-1) (20-40degC) | 82    |
|                       | (20-100degC)                                         | 94    |
|                       | Thermal conductivity (W M-1 K-1)                     | 0.85  |
|                       | Maximum thermal loading (watts/cm)                   | 375   |
|                       |                                                      |       |
| Mechanical properties | Density (g cm-3)                                     | 2.90  |
|                       | Young's modulus (103 N/mm2)                          | 67    |
|                       | Poisson's ratio                                      | 0.24  |
|                       | Knoop hardness (Kgf/mm2)                             | 435   |
|                       |                                                      |       |
| Chemical properties   | Durability (Wt. lossx10-5 g/cm2, H2O, 100degC, 1 H)  | 5.2   |

Caption: Properties of QX/Er glass

You are provided with a table from a material science paper. Here are JSON templates for two types of numeric cells: "Other" and "Glass_Compound_Amount":
{"value": "xx", "type": "Other"}
{"value": "xx", "type": "Glass_Compound_Amount", "constituent": "xx", "unit": "xx", "material": "xx"}

Please describe all numeric cells in the above table following the JSON templates (proceeding by row in a left-right, top-down direction). For each cell, output one JSON description per line. For any unanswerable attributes in the templates, set their value to the placeholder "xx".

Cell Description:
{"value": "1535", "type": "Other"}
{"value": "0.8", "type": "Other"}
{"value": "7.9", "type": "Other"}
{"value": "55", "type": "Other"}
{"value": "1.533", "type": "Other"}
{"value": "1.521", "type": "Other"}
{"value": "3.3", "type": "Other"}
{"value": "450", "type": "Other"}
{"value": "485", "type": "Other"}
{"value": "82", "type": "Other"}
{"value": "94", "type": "Other"}
{"value": "0.85", "type": "Other"}
{"value": "375", "type": "Other"}
{"value": "2.90", "type": "Other"}
{"value": "67", "type": "Other"}
{"value": "0.24", "type": "Other"}
{"value": "435", "type": "Other"}
{"value": "5.2", "type": "Other"}